An adjustable universal spreader

Abstract

The utility model discloses a general lifting appliance of adjustable, include: main beam, its by a plurality of standard section through connecting piece splicing and become modular truss beam, two lifting seat subassembly, lifting seat subassembly detachably installed on main beam, be used for connecting hoisting equipment, and two lifting seat subassembly on the installation position of main beam is adjustable, two hoisting crossbeam, hoisting crossbeam detachably installed on main beam, hoisting crossbeam is used for connecting the hoisted object, positioning mechanism, it sets up on main beam, is used for two hoisting crossbeam selectively positioning installation on the different position of main beam length direction, to adapt to the hoisted object of different length. Solveed the problem that the existing lifting appliance cannot according to the hoisted object length flexible regulation hoisting range, lead to the poor commonality and the problem of low operating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to an adjustable universal lifting equipment. Background Technology

[0002] Currently in China, the conventional lifting equipment used in construction engineering, port logistics, and equipment installation mainly relies on two types: integrated steel beam lifting equipment and simple modular lifting equipment. Integrated steel beam lifting equipment, which uses a single welded steel main beam (mostly I-beams), has fixed lifting point positions and can only be used for single-sized loads. For example, lifting equipment designed for components 4-6m in length and weighing less than 30 tons cannot be used for ultra-long and ultra-heavy components 8-12m in length and weighing over 50 tons. Simple modular lifting equipment can extend the main beam by bolting, but because it often uses ordinary steel sections for splicing, its rigidity is insufficient. Under heavy loads, the main beam is prone to bending deformation and bolt loosening, posing significant safety hazards to lifting operations. In the field of construction engineering, the assembly and transportation of precast components often utilizes 12m I-beams as the main beam, with lifting lugs welded to both ends. The spacing between lifting points is generally fixed at 6m, which is only suitable for precast beams with a lifting length of about 6m. If longer precast beams need to be lifted, specialized main beam lifting equipment must be used, resulting in the need to keep multiple sets of lifting equipment on site, increasing turnover costs. In addition, when adjusting the lifting range, existing lifting equipment requires the complete disassembly of the main beam or replacement of the lifting point components, which is time-consuming and cannot flexibly adjust the load-bearing capacity of the main beam according to the lifting weight, thus limiting its use in ultra-long and ultra-heavy applications.

[0003] While existing lifting tools can meet the needs of simple lifting conditions, they have significant shortcomings in ultra-long, heavy-load, and multi-specification lifting scenarios: First, there is a contradiction between load-bearing capacity and adaptability. The load-bearing capacity of ordinary steel main beam lifting tools is ≤40 tons, which cannot meet the lifting needs of heavy-duty components weighing 50-100 tons. On the other hand, special heavy-duty lifting tools can only be matched with fixed-length components and cannot flexibly adjust the lifting range. Second, the efficiency of adjusting the lifting range is low. Existing adjustable lifting tools require disassembly of splicing bolts, replacement of main beam sections or lifting point components, and adjustment of a single set of lifting tools. The time required is ≥60 minutes, which cannot adapt to multiple batches and multiple specifications of hoisting operations with tight schedules; third, the modularity is low, and the main beam, lifting lugs and connecting parts of the existing lifting tools are mostly welded and fixed. If a part is damaged, the whole thing must be scrapped, resulting in high maintenance costs. Moreover, it is not possible to flexibly add or remove components according to hoisting needs (such as adding lifting points or extending the main beam), resulting in poor versatility; fourth, the versatility is insufficient. Multiple sets of special lifting tools are required for objects of different weights and lengths, resulting in high inventory costs for lifting tools. Furthermore, if a part is damaged, the whole thing must be scrapped, resulting in low resource utilization. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an adjustable universal lifting tool. This solves the problem that existing lifting tools cannot flexibly adjust the lifting range according to the length of the object being lifted, resulting in poor versatility and low operational efficiency.

[0005] This utility model is achieved using the following technical solution:

[0006] An adjustable universal lifting tool, comprising:

[0007] The main beam is a modular truss beam assembled from multiple standard segments using connectors.

[0008] Two lifting bracket assemblies are detachably mounted on the main beam for connecting lifting equipment, and the mounting positions of the two lifting bracket assemblies on the main beam are adjustable;

[0009] Two lifting beams are detachably mounted on the main beam and are used to connect the object being lifted.

[0010] A positioning mechanism, which is installed on the main beam, is used to selectively position the two lifting crossbeams at different positions along the length of the main beam to accommodate loads of different lengths.

[0011] Furthermore, the positioning mechanism includes multiple sets of limiting units distributed on both sides of the central axis of the main beam. Each set of limiting units is symmetrically arranged with respect to the central axis of the main beam. The lifting crossbeam is configured to selectively cooperate with the selected limiting unit to achieve positioning and installation with the main beam.

[0012] Furthermore, the limiting unit is a first limiting member installed on the main beam. The first limiting member and the main beam are detachably connected through a first detachable connector, so that the first limiting member can be selectively fixed at different positions along the length direction of the main beam.

[0013] Furthermore, the main beam is provided with a second limiting member for limiting the sliding range of the hanging seat assembly. The second limiting member is detachably connected to the main beam through a second detachable connector, so that the second limiting member can be selectively fixed at different positions along the length direction of the main beam.

[0014] Furthermore, both the first detachable connector and the second detachable connector include locking components, and the main beam is provided with a mating structure arranged along its length direction. The locking component engages with the mating structure to lock and fix the first limiting component and / or the second limiting component onto the main beam.

[0015] Furthermore, the mating structure is a plurality of positioning holes provided on the main beam, the locking element is a pin that can be inserted into the positioning hole, or the locking element is a bolt, the mating structure is a long hole or threaded hole provided on the main beam, or the locking element is a wedge block, the mating structure is a wedge groove provided on the main beam, and locking is achieved by striking the wedge block to wedge it into the wedge groove.

[0016] Furthermore, the standard segment is a Bailey beam.

[0017] Furthermore, the Bailey beam is composed of multiple 321-type Bailey panels or the Bailey beam is composed of multiple 450-type Bailey panels.

[0018] Furthermore, the lifting beam is a spreader beam, which is a box-shaped cross section made of thick steel plates welded together.

[0019] Furthermore, the suspension bracket assembly includes a suspension bracket connected to the main beam and a lifting lug disposed on the suspension bracket.

[0020] Compared with the prior art, the beneficial effects of this utility model include at least the following:

[0021] The main beam of this invention serves as the core load-bearing structure, assembled from multiple standard segments. This allows for flexible adjustment of the main beam's length, providing a stable foundation platform for dynamic adaptation of the lifting range. Two lifting bracket assemblies are detachably installed on the main beam, and their installation positions can be adjusted according to the length requirements of the lifted object. This enables rapid repositioning of the lifting equipment connection points, avoiding the cumbersome process of disassembling the entire main beam or replacing specialized lifting tools as required in existing technologies. Two lifting crossbeams are detachably installed below the main beam for connecting the lifted object via slings. Their positions can be selectively fixed via a positioning mechanism to directly match the center of gravity distribution of lifted objects of different lengths, ensuring balance and safety during the lifting process and avoiding the risk of component tilting due to fixed lifting points. The positioning mechanism, mounted on the main beam, selectively positions the lifting crossbeam at different locations along its length. This selective positioning function allows for immediate fixing and adjustment of the lifting crossbeam's position without the need for bolt disassembly or component replacement. This significantly reduces the time required to adjust the lifting range, adapting to the tight schedules of multi-batch, multi-specification lifting operations. Therefore, the lifting range of this lifting tool can be flexibly adjusted according to the length of the object being lifted, effectively solving the problem of existing lifting tools being unable to flexibly adjust their lifting range based on the object's length. This significantly improves the tool's versatility and operational efficiency, avoiding the risk of component tilting due to fixed lifting points and the excessively time-consuming adjustment process. Attached Figure Description

[0022] Figure 1This is one of the schematic diagrams of an adjustable universal lifting tool according to an embodiment of this utility model;

[0023] Figure 2 This is a second schematic diagram of an adjustable universal lifting tool according to an embodiment of this utility model;

[0024] Figure 3 This is a schematic diagram of the main beam according to an embodiment of the present utility model;

[0025] Figure 4 This is a schematic diagram of the splicing of two Bailey beams according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram showing the distribution of the first and second limiting members on the main beam according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the first limiting member according to an embodiment of the present utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the second limiting member according to an embodiment of the present utility model;

[0029] Figure 8 This is a front view of the hanging bracket assembly according to an embodiment of the present utility model;

[0030] Figure 9 This is a side view of the hanging bracket assembly according to an embodiment of the present utility model;

[0031] Figure 10 This is a front view of the spreader beam according to an embodiment of this utility model;

[0032] Figure 11 This is a side view of the spreader beam according to an embodiment of the present utility model;

[0033] In the diagram: 1. Main beam; 11. Bailey beam; 12. Connector; 2. Lifting bracket assembly; 21. Lifting bracket; 22. Lifting lug; 3. Lifting crossbeam; 4. First limiting component; 5. Second limiting component; 6. Lifting wire rope; 7. Lifting wire rope; 8. Lifted object. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0035] The terms used to describe position and direction in this utility model are illustrated with the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this utility model.

[0036] like Figures 1 to 11 As shown, this utility model provides an adjustable universal lifting tool, comprising:

[0037] Main beam 1, which is a modular truss beam spliced ​​together by multiple standard segments through connectors 12;

[0038] Two lifting bracket assemblies 2 are detachably mounted on the main beam 1 for connecting lifting equipment, and the mounting positions of the two lifting bracket assemblies 2 on the main beam 1 are adjustable;

[0039] Two lifting beams 3 are detachably installed on the main beam 1, and the lifting beams 3 are used to connect the object being lifted 8.

[0040] A positioning mechanism, which is installed on the main beam 1, is used to selectively position the two lifting beams 3 at different positions along the length of the main beam 1 to accommodate loads 8 of different lengths.

[0041] In this embodiment, the main beam 1 serves as the core load-bearing structure, assembled from multiple standard segments. These standard segments are pre-manufactured standardized beam units, which can be prefabricated components of equal or different lengths. The standard segment configuration allows the length of the main beam 1 to be flexibly increased or decreased according to the actual dimensions of the object being lifted 8, without requiring the complete replacement of the main beam 1 or the disassembly of fixed components. This solves the problem of having to maintain multiple sets of lifting equipment due to fixed lengths in existing technologies, significantly improving the turnover efficiency of lifting equipment in different lifting scenarios and providing a stable foundation platform for dynamic adaptation of the lifting range. Two lifting base assemblies 2 are detachably installed on the main beam 1, and their installation positions can be adjusted according to the length requirements of the object being lifted 8. This enables rapid repositioning of the lifting equipment connection points, avoiding the cumbersome process of requiring the complete disassembly of the main beam 1 or the replacement of specialized lifting equipment as in existing technologies. Two lifting beams 3 are detachably installed below the main beam 1 to connect the load 8. Their positions can be selectively fixed by a positioning mechanism to directly match the center of gravity distribution of loads 8 of different lengths, ensuring balance and safety during the lifting process and avoiding the risk of component tilting due to fixed lifting points. The positioning mechanism is set on the main beam 1 to selectively position the lifting beams 3 at different positions along the length of the main beam 1. Based on the selective positioning function of the positioning mechanism, the position of the lifting beams 3 can be fixed and adjusted instantly without relying on bolt disassembly or component replacement, greatly shortening the adjustment time of the lifting range and adapting to the tight schedule requirements of multiple batches and multiple specifications of lifting operations.

[0042] In one specific implementation, the standard segments are triangular truss units made of high-strength steel. These segments are spliced ​​together using connectors 12 (pins or bolts), achieving a quick and reliable connection between segments. This ensures the stability of the connections during heavy-load hoisting to avoid the risk of loosening, and simplifies the on-site assembly process, reducing adjustment time from over 60 minutes in the traditional method to an acceptable range. The modular truss beam structure significantly enhances the overall stiffness of the main beam 1 by utilizing truss geometric stability, effectively distributing the hoisting load and suppressing bending deformation of the main beam 1 under 50-100 ton heavy loads. Its modular nature also allows for replacement of only the damaged segments in case of localized damage, avoiding complete scrapping, reducing maintenance costs, and improving resource utilization. When hoisting longer components, the main beam 1 can be extended by increasing the number of standard segments, simplifying and accelerating the on-site assembly process. The lifting seat assembly 2 is detachably fixed to the main beam 1 via bolt connections, while the lifting crossbeam 3 is quickly locked in a selected position on the main beam 1 using an adjustable latching device in the positioning mechanism to accommodate loads 8 of different lengths. Therefore, the lifting range of the lifting device can be flexibly adjusted according to the length of the object being lifted (8), effectively solving the problem that existing lifting devices cannot flexibly adjust the lifting range according to the length of the object being lifted (8). This significantly improves the versatility and operational efficiency of the lifting device, and avoids the risks of component tilting caused by fixed lifting points and the drawbacks of excessively long adjustment processes. This lifting device constructs a lifting device system that can quickly adapt to multiple specifications of objects being lifted (8), effectively overcoming the shortcomings of fixed lifting points and cumbersome adjustments in existing lifting devices, and significantly improving the versatility and operational efficiency of lifting operations.

[0043] In a preferred embodiment, the positioning mechanism includes multiple sets of limiting units distributed on both sides of the central axis of the main beam 1. Each set of limiting units is symmetrically arranged with respect to the central axis of the main beam 1. The lifting crossbeam 3 is configured to selectively cooperate with the selected limiting unit to achieve positioning and installation with the main beam 1.

[0044] In this embodiment, reference Figure 5 Multiple sets of limiting units distributed on both sides of the central axis of the main beam 1 provide multiple preset positioning points, allowing the operator to directly select the corresponding position according to the length of the suspended object 8. This avoids the tedious operation of repeatedly measuring and manually moving components during adjustment, thus significantly shortening preparation time. Each set of limiting units (such as...) Figure 5The symmetrical arrangement of d1-d12 on the central axis of the main beam 1 ensures precise correspondence of the limiting units on both sides of the main beam 1. This symmetrical layout not only ensures uniform stress distribution during the installation of the lifting beam 3, effectively preventing the main beam 1 from twisting and deforming during heavy-load hoisting, but also simplifies the operation process, as operators can quickly complete the installation from either side of the main beam 1 without additional calibration. The lifting beam 3 is configured to selectively cooperate with selected limiting units to achieve positioning and installation with the main beam 1. This mechanism allows the lifting beam 3 to connect directly to the target limiting unit through a simple locking action, without disassembling the entire positioning mechanism or using auxiliary tools, thus achieving immediacy and flexibility in position adjustment and adapting to the efficient switching requirements of multiple batches and multiple specifications of hoisting operations. By optimizing the structural design of the positioning mechanism, the preparation time for adjusting the position of the lifting beam 3 is significantly shortened, improving the convenience and efficiency of the position adjustment of the lifting beam 3 and increasing the efficiency of hoisting range adjustment; at the same time, it ensures the structural stability of the main beam 1 during heavy-load hoisting.

[0045] In a preferred embodiment, the limiting unit is a first limiting member 4 installed on the main beam 1. The first limiting member 4 and the main beam 1 are detachably connected by a first detachable connector 12, so that the first limiting member 4 can be selectively fixed at different positions along the length direction of the main beam 1.

[0046] In this embodiment, reference Figure 6 The limiting unit is defined as the first limiting member 4 installed on the main beam 1. This design makes the limiting unit a dedicated component independent of the main beam 1, avoiding the structural limitations of being integrally formed with the main beam 1. This allows the limiting unit to operate as a separate module, providing a basis for position adjustment. By detachably connecting the first limiting member 4 to the main beam 1 via the first detachable connector 12, compared to traditional welding or fixed installation, the first limiting member 4 can be detached from the main beam 1 without tools or complex procedures. This avoids the cumbersome steps of disassembling the main beam 1 or replacing components during adjustment, directly simplifying the operation process. The design allows the first limiting member 4 to be selectively fixed at different positions along the length of the main beam 1. Based on the detachable connection, operators can directly move and fix the first limiting member 4 to any suitable position on the main beam 1 according to the actual length requirements of the object 8 being lifted, without the need for additional component replacement or structural redesign. This enables instant adjustment of the lifting range and enhances the rapid response capability of the lifting equipment to objects 8 of different specifications. By specifying the limiting unit as a detachable first limiting component 4, the adjustment process is simplified, the operation time is shortened, and the defect of the fixed and unadjustable position of the limiting unit is effectively solved. This significantly improves the adjustment flexibility and adaptability of the lifting device, and enhances the efficiency and versatility of the lifting operation. It is especially suitable for lifting scenarios that require frequent switching between different specifications of the lifted objects 8.

[0047] In a preferred embodiment, the main beam 1 is provided with a second limiting member 5 for limiting the sliding range of the hanging bracket assembly 2. The second limiting member 5 is detachably connected to the main beam 1 through a second detachable connector 12, so that the second limiting member 5 can be selectively fixed at different positions along the length direction of the main beam 1.

[0048] In this embodiment, reference Figure 7 By introducing an adjustable second limiting component 5, the problem of accidental slippage of the lifting seat assembly 2 during the adjustment process is effectively solved, thereby ensuring the stability and safety of the lifting operation. Specifically, the second limiting member 5 installed on the main beam 1 acts as a physical blocking structure, directly constraining the range of motion of the lifting seat assembly 2 and preventing it from sliding unexpectedly due to external forces during hoisting. This avoids the risk of the lifting device becoming unbalanced due to slippage. The second limiting member 5 is connected to the main beam 1 by a second detachable connector 12. This design, based on the flexibility of detachable connection, allows the second limiting member 5 to be quickly adjusted according to actual hoisting needs, avoiding the limitations of fixed limiting structures that cannot adapt to multiple specifications of hoisting, while ensuring the reliability of the connection. The second limiting member 5 can be selectively fixed at different positions along the length of the main beam 1. Based on the linear layout characteristics of the main beam 1, the limiting point and the installation position of the lifting seat assembly 2 are precisely matched, thereby dynamically adapting to different lengths and weights of the hoisted objects 8 under various hoisting configurations. This maintains the adjustability advantage of the lifting seat assembly 2, eliminates the risk of slippage, and ultimately improves the versatility and operational safety of the lifting device under complex working conditions.

[0049] In a preferred embodiment, both the first detachable connector 12 and the second detachable connector 12 include locking members. The main beam 1 is provided with a mating structure arranged along its length direction. The locking member engages with the mating structure to lock and fix the first limiting member 4 and / or the second limiting member 5 onto the main beam 1.

[0050] In this embodiment, the core problems of low adjustment efficiency and unreliable connection during the installation of the limiting component are solved through the coordinated design of the locking component and the mating structure. Specifically, both the first detachable connector 12 and the second detachable connector 12 include locking components. Based on the specific design of the locking components (such as pins, bolts, or wedges), operators can quickly complete the locking and releasing actions without relying on complex tools, avoiding the tedious process of tightening each bolt individually in traditional bolt connections, and significantly shortening the position adjustment time. By setting continuous or discrete positioning points along the length of the main beam 1, the limiting component can flexibly select the installation position to adapt to different lengths of the suspended object 8 according to the layout of the mating structure, enhancing the adaptability of the lifting device to various working conditions, while avoiding the problem of overall scrapping due to local damage. The locking element engages with the mating structure to lock and fix the first limiting element 4 and / or the second limiting element 5 onto the main beam 1. Through the direct mechanical engagement between the locking element and the mating structure, and based on the physical characteristics of the engagement mechanism (such as pins inserting into positioning holes, wedge blocks wedging into grooves, etc.), it can effectively resist vibration and impact forces during heavy-duty hoisting, ensuring that the limiting elements remain stable under dynamic loads and preventing slippage or loosening, thereby guaranteeing the safety and reliability of the hoisting process. By simplifying the adjustment operation of the first limiting element 4 and the second limiting element 5 into a quick engagement action, it balances efficiency and stability, providing a practical solution for ultra-long and ultra-heavy hoisting scenarios.

[0051] In a preferred embodiment, the mating structure is a plurality of positioning holes provided on the main beam 1, the locking element is a pin that can be inserted into the positioning holes, or the locking element is a bolt, the mating structure is an elongated hole or a threaded hole provided on the main beam 1, or the locking element is a wedge block, the mating structure is a wedge groove provided on the main beam 1, and locking is achieved by striking the wedge block to wedge it into the wedge groove.

[0052] In this embodiment, by providing diverse combinations of mating structures and locking components, the core problems of low operational efficiency and insufficient connection reliability during the adjustment of the lifting device are effectively solved. Specifically, based on the multiple positioning holes provided on the main beam 1, the locking component adopts the form of an insertable pin, which allows the positioning and installation of the limiting component to be completed quickly without complex tools, avoiding the rotation and tightening steps of traditional bolt connections, and significantly shortening the adjustment time; or, based on the elongated holes or threaded holes provided on the main beam 1, the locking component adopts the form of a bolt, allowing flexible sliding adjustment within a certain range before locking, which not only meets the needs of fine adjustment but also ensures the connection strength under heavy loads; in addition, based on the wedge groove provided on the main beam 1, the locking component adopts a wedge block and achieves wedge locking by tapping. This self-locking mechanism utilizes the frictional self-tightening characteristics of the wedge structure, which can effectively prevent loosening in a vibration environment and improve the stability of the lifting device in ultra-long and ultra-heavy lifting. These technical features work together to enable the lifting device to quickly adapt to the lifted objects 8 of different lengths and weights, simplifying the on-site operation process, while enhancing the connection's firmness, thus balancing adjustment efficiency and operational safety.

[0053] In a preferred embodiment, the standard segment is a Bailey beam 11.

[0054] In this embodiment, Bailey beam 11 is used as the standard segment of main beam 1. Utilizing its unique truss structure characteristics, the load-bearing capacity and structural stability of main beam 1 are fundamentally improved, thus addressing the insufficient stiffness of main beam 1 in heavy-load hoisting scenarios. The standard segment, Bailey beam 11, employs a truss system composed of triangular units, which efficiently converts hoisting loads into axial force transmission, avoiding stress concentration and plastic deformation that easily occur in ordinary solid-web steel beams under bending loads. This ensures that main beam 1 maintains overall stiffness and geometric stability under 50-100 ton heavy-load conditions. Specifically, Bailey beam 11 is composed of multiple 321-type Bailey sections. Each Bailey beam 11 consists of three sets of parallel-arranged 321-type reinforced chord Bailey beams 11. Each Bailey beam 11 measures 3.0m × 1.5m, and the chords are made of 16Mn high-strength alloy steel to ensure high overall load-bearing capacity and fatigue resistance. Each Bailey bridge section is interconnected with an angle steel support frame via high-strength pins, forming a rigid, integral main beam 1 structure. To ensure stability after lifting point adjustments, a second limiting component 5 is welded to the upper chord of each Bailey bridge section to limit the sliding range of the lifting seat assembly 2 and ensure precise positioning. Depending on the length requirements of the bridge beam, Bailey bridge sections can be combined and spliced ​​in 3 to 13 groups, allowing the total length of the main beam 1 to be freely adjusted within the range of 15 to 40 meters. The rated load-bearing capacity of a single main beam 1 is no less than 100 tons, meeting the lifting operation requirements of large-span, heavy-load bridge beams. Based on the characteristics of the 321-type Bailey bridge section as a standardized lightweight truss unit, it can be quickly spliced ​​into main beam 1 segments using pins or bolts. While maintaining sufficient bending strength, it also considers the ease of assembly and modular flexibility under medium load scenarios, avoiding resource waste caused by structural redundancy. In other embodiments, the Bailey beam 11 can also be implemented by combining multiple 450-type Bailey panels. This leverages the higher section modulus and material strength of the 450-type Bailey panels to construct a heavy-duty load-bearing structure, effectively coping with the ultimate load impact during the hoisting of ultra-heavy components. This prevents the main beam 1 from becoming unstable or breaking under dynamic loads, expanding the applicability of the lifting equipment in ultra-long and ultra-heavy working conditions. Overall, by selecting differentiated combinations of Bailey panel models, the load-bearing capacity of the main beam 1 can be configured on demand, retaining the adjustment advantages of modular lifting equipment while overcoming the reliability defects of traditional spliced ​​structures under heavy loads.

[0055] This invention uses a standardized Bailey beam 11 as the core load-bearing component of the lifting device, replacing the traditional integrated welded rigid structure. Utilizing the standardized, lightweight, and high-load-bearing characteristics of the Bailey beam 11, the lifting device offers advantages such as rapid assembly, easy transportation, and reusability. Furthermore, by employing the densely distributed standardized nodes on the Bailey beam 11 and adding a first limiting component 4, precise and flexible positioning of the lifting beam 3 is achieved within a large span range. The adjustment range is theoretically equal to the total length of the Bailey beam 11, easily covering beam length requirements from tens of meters to hundreds of meters, achieving "one device for multiple uses." The densely distributed nodes on the Bailey beam 11 provide multiple potential anchorage positions for lifting. This is not only for flexible adjustment but also a load distribution and optimization design. By selecting the optimal lifting position, the load 8 can be subjected to the most reasonable stress, avoiding local overload and improving safety from the design stage.

[0056] In a preferred embodiment, the lifting beam 3 is a spreader beam, which is a box-shaped cross section made of thick steel plates welded together.

[0057] In this embodiment, the spreader beam is located between the main beam 1 and the suspended object 8, and can be connected to the suspended object 8 via the lifting wire rope 7 to transfer the lifting load and maintain force balance. By defining the lifting beam 3 as a spreader beam and using thick steel plates welded into a box-shaped section, the problem of insufficient rigidity of the lifting beam 3 in heavy-duty lifting is solved. Specifically, the lifting beam 3 is designed as a spreader beam, which is reinforced by high-strength bolts and stiffening ribs. The spreader beam is fixed by the first limiting member 4, forming a rigid and stable hoisting connection system. This system ensures that the hoisting load is evenly distributed along the length of the beam, avoiding local stress concentration and thus improving the overall stability of the hoisting process. The spreader beam is made of thick steel plates welded into a box-shaped section. The closed structure of the box-shaped section significantly enhances the bending and torsional stiffness. The selection of thick steel plates further improves the material strength and durability, while the welding process ensures the integrity of the section and the reliability of the structure. This makes the lifting beam 3 less prone to bending deformation when bearing ultra-long and ultra-heavy component loads, effectively supporting the safe implementation of heavy-duty hoisting operations.

[0058] In a preferred embodiment, the hanger assembly 2 includes a hanger 21 connected to the main beam 1 and a lug 22 disposed on the hanger 21.

[0059] In this embodiment, the lifting base assembly 2 is a key component for achieving adjustable lifting points and rigging installation. It is mainly used to connect the lifting wire rope 6, lifting chain, or balancing rigging. By deconstructing the lifting base assembly 2 into independent combinations of the lifting base 21 and the lifting lug 22, the adjustment efficiency and maintainability of the lifting equipment are effectively improved. The lifting base 21 is detachably connected to the main beam 1 through the second limiting member 5, allowing the lifting base assembly 2 to be quickly installed or disassembled according to different positions along the length of the main beam 1. This avoids the irreversibility of traditional welded structures, thus eliminating the need to completely disassemble the main beam 1 when adjusting the lifting range, significantly simplifying the operation process. The lifting lug 22 is installed on the lifting base 21, which allows the lifting connection point to be replaced or repaired independently of the main beam 1. When the lifting lug 22 needs to be repaired due to wear or damage, only the lifting lug 22 component needs to be replaced without affecting the integrity of the lifting base and the main beam 1. This is based on the design of the lifting base 21 as an intermediate carrier, which not only ensures the reliability of the connection of the lifting equipment, but also improves the resource utilization rate. At the same time, it adapts to the need for rapid switching of the lifted objects 8 of different weights and specifications, and solves the problems of low adjustment efficiency and high maintenance costs caused by the rigid structure in the existing technology.

[0060] It is understandable that the installation position of the lifting bracket assembly 2 can be freely selected according to the lifting plan. Specifically, the lifting bracket assembly 2 can be formed by welding threaded steel support rods to 10mm thick Q345 steel plates, and has the characteristics of compact structure, convenient installation and strong reusability.

[0061] The working principle of the lifting device of this utility model is as follows:

[0062] Before the hoisting operation, a suitable number of Bailey beams 11 are selected and assembled according to the specific length, weight, and center of gravity of the bridge girder. Each unit is quickly spliced ​​into an overall frame via the end connectors 12 of the Bailey beams 11 using pins. Subsequently, the lifting base assembly 2 and the lifting crossbeam 3 can be adjusted along the second limiting member 5 and the first limiting member 4 of the upper and lower chords of the Bailey beams 11. By changing the relative positions of the two, the spacing between the lifting points can be flexibly adjusted to meet the hoisting requirements of beams of different lengths.

[0063] Once adjusted to the designed position, the operator locks the first limiting piece 4 and the second limiting piece 5 to lock the lifting seat assembly 2 and the lifting beam 3, thereby forming a stable frame with high structural rigidity and uniform stress distribution, ensuring that the entire lifting system maintains a safe and reliable stress state during lifting and transportation.

[0064] Compared to existing lifting devices that are only compatible with a single beam length, this utility model significantly expands the range of applications, covering common bridge beam lengths such as 15m, 20m, 25m, 30m, and 35m, eliminating the need to stock multiple sets of lifting devices for different beam lengths. For example, in a bridge project involving the mixed erection of 15-38m I-beams, this lifting device allows for the erection of all beams simply by adjusting the number of Bailey bridge sections and the lifting point positions, reducing lifting device inventory costs by 75% and the number of lifting device transfers by 80%. Based on the rapid assembly feature of the Bailey bridge 11, the efficiency of main beam assembly and disassembly of this lifting device is significantly improved, and the lifting point adjustment process is more convenient and efficient. Compared to traditional integral welded lifting equipment, this structure can complete the entire process from assembly and adjustment to beam hoisting in a shorter time, significantly improving on-site construction efficiency. The modular design allows each component of the lifting equipment (such as Bailey beam 11, main beam 1, spreader beam, and lifting seat assembly 2) to be independently disassembled and replaced. When a local component is damaged, there is no need to replace the entire lifting equipment, greatly reducing maintenance and repair costs. At the same time, standardized components such as Bailey panels have excellent reusability, allowing for recycling across multiple projects, improving equipment turnover and significantly reducing resource waste, achieving a dual optimization of economy and sustainability.

[0065] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. An adjustable universal lifting tool, characterized in that, include: The main beam (1) is a modular truss beam spliced ​​together by multiple standard segments through connectors (12); Two lifting bracket assemblies (2) are detachably mounted on the main beam (1) for connecting lifting equipment, and the mounting positions of the two lifting bracket assemblies (2) on the main beam (1) are adjustable; Two lifting beams (3) are detachably installed on the main beam (1) and are used to connect the object being lifted (8). A positioning mechanism is provided on the main beam (1) to selectively position the two lifting beams (3) at different positions along the length of the main beam (1) to accommodate loads (8) of different lengths.

2. The adjustable universal lifting tool according to claim 1, characterized in that, The positioning mechanism includes multiple sets of limiting units distributed on both sides of the central axis of the main beam (1). Each set of limiting units is symmetrically arranged with respect to the central axis of the main beam (1). The lifting crossbeam (3) is configured to selectively cooperate with the selected limiting unit to achieve positioning and installation with the main beam (1).

3. The adjustable universal lifting tool according to claim 2, characterized in that, The limiting unit is a first limiting member (4) installed on the main beam (1). The first limiting member (4) and the main beam (1) are detachably connected through a first detachable connector (12), so that the first limiting member (4) can be selectively fixed at different positions along the length direction of the main beam (1).

4. The adjustable universal lifting tool according to claim 3, characterized in that, The main beam (1) is provided with a second limiting member (5) for limiting the sliding range of the hanging seat assembly (2). The second limiting member (5) is detachably connected to the main beam (1) through a second detachable connector (12), so that the second limiting member (5) can be selectively fixed at different positions along the length direction of the main beam (1).

5. The adjustable universal lifting tool according to claim 4, characterized in that, Both the first detachable connector (12) and the second detachable connector (12) include locking members. The main beam (1) is provided with a mating structure arranged along its length direction. The locking member engages with the mating structure to lock and fix the first limiting member (4) and / or the second limiting member (5) onto the main beam (1).

6. The adjustable universal lifting tool according to claim 5, characterized in that, The mating structure is a plurality of positioning holes provided on the main beam (1), the locking element is a pin that can be inserted into the positioning hole, or the locking element is a bolt, the mating structure is a long hole or threaded hole provided on the main beam (1), or the locking element is a wedge block, the mating structure is a wedge groove provided on the main beam (1), and locking is achieved by striking the wedge block to wedge it into the wedge groove.

7. The adjustable universal lifting tool according to claim 1, characterized in that, The standard segment is a Bailey beam (11).

8. The adjustable universal lifting tool according to claim 7, characterized in that, The Bailey beam (11) is composed of multiple 321-type Bailey panels or the Bailey beam (11) is composed of multiple 450-type Bailey panels.

9. The adjustable universal lifting tool according to claim 1, characterized in that, The lifting beam (3) is a spreader beam, which is a box-shaped cross section made of thick steel plates welded together.

10. The adjustable universal lifting tool according to claim 1, characterized in that, The hanger assembly (2) includes a hanger (21) connected to the main beam (1) and a lug (22) disposed on the hanger (21).

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