An experimental device for a special lifting appliance for heavy equipment and a method of using the same

Abstract

The present application relates to a kind of experimental device of special lifting appliance of heavy equipment, including lifting appliance body and support module, the lifting appliance body includes load platform, the upper portion of the load platform is provided with lifting beam, the balancing beam is arranged between the lifting beam and load platform, the middle part of the balancing beam is provided with the connecting device for connecting lifting beam, lower portion is provided with the connecting rod for connecting load platform, the actual heavy load operation scene of heavy equipment lifting appliance can be accurately simulated by load platform, balancing beam and lifting beam, the structural strength, stability and adaptability of each component of lifting appliance are comprehensively detected, and each module of device is detachable, replaceable, and the experimental needs of different specifications lifting appliance are adapted, reliable experimental support is provided for the research and development, detection of heavy equipment lifting appliance, the safety and reliability of lifting appliance in actual operation are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment testing technology, specifically to an experimental apparatus for a special lifting tool for heavy equipment and its usage method. Background Technology

[0002] In heavy industry, port shipping, and construction machinery, specialized lifting equipment is a core component for load transfer. Its structural stability and load-bearing safety directly determine the reliability of lifting operations and are crucial for preventing lifting accidents and ensuring the safety of personnel and equipment. These lifting equipment must be compatible with heavy equipment of different specifications (such as ship main engines, wind turbine towers, and bridge components) and are subject to dynamic impact loads over long periods. They are prone to latent defects such as wear, corrosion, and cracks. Therefore, rigorous testing and experiments are essential to verify that their performance meets industry standards and usage requirements, ensuring safe operation in actual working conditions.

[0003] Currently, the testing of heavy equipment lifting tools mainly relies on traditional testing equipment, which generally suffers from fixed structures and poor adaptability. Due to the diverse specifications and significant size variations of heavy equipment lifting tools, testing different specifications requires the complete disassembly, adjustment, and reinstallation of the lifting tool body and its supporting structure. This process is cumbersome, time-consuming, and labor-intensive, significantly reducing testing efficiency and failing to meet the demands of multi-specification, continuous testing. Especially in batch lifting tool testing or alternating testing of multiple lifting tool models, frequent disassembly and reassembly lead to extended testing cycles and increased costs, failing to meet the demands of modern, efficient, and large-scale testing operations.

[0004] Meanwhile, during the testing of lifting devices, the structural stability of the experimental setup directly affects the accuracy of the test data and the safety of the testing operation. Traditional experimental setups lack effective reinforcing support structures at the lifting device connection points, relying solely on the rigidity of the lifting device itself for load support. Under the load of simulating heavy equipment lifting, the lifting device connection points are prone to swaying and displacement, which not only leads to deviations in the test data and affects the reliability of the test results, but may also cause safety hazards such as lifting device detachment and damage to the experimental setup in severe cases, failing to provide a stable and reliable experimental environment for the performance evaluation of the lifting devices.

[0005] In the existing technology, some lifting device test equipment attempts to improve stability by adding support components, but most of them are integrated structural designs, which cannot be adapted to the disassembly and adjustment of the lifting body in a synchronized manner, and the support effect is limited, making it difficult to balance testing efficiency and structural stability. Summary of the Invention

[0006] To address the aforementioned issues, this invention provides an experimental device for a special lifting tool for heavy equipment. Utilizing a modularly designed lifting tool body and support modules, the installation and replacement of the lifting tool can be completed quickly. It is particularly suitable for multi-specification and continuous testing operations. Furthermore, the use of crossbars can strengthen the connection of the entire lifting tool, improving the overall stability of the lifting tool during use.

[0007] To achieve the above objectives, the present invention employs the following technical solution: an experimental device for a special lifting tool for heavy equipment, comprising a lifting tool body and a support module. The lifting tool body includes a load-bearing platform, a lifting beam is provided above the load-bearing platform, a balance beam is provided between the lifting beam and the load-bearing platform, a connecting device for connecting the lifting beam is provided in the middle of the balance beam, and a connecting rod for connecting the load-bearing platform is provided at the bottom. The support module includes protective platforms located on both sides of the load-bearing platform, and a cross platform located on both sides of the balance beam is provided between the two protective platforms.

[0008] As a further improvement to the above technical solution:

[0009] The load-bearing platform includes a rectangular frame, within which multiple parallel support beams are arranged, and a longitudinal crossbeam is arranged between two adjacent support beams.

[0010] The rectangular frame has guardrails at both ends and hinged seats for mounting connecting rods on both sides.

[0011] The connecting rod includes two symmetrically distributed tie rods, each of which is hinged at both ends to the load-bearing platform and the balance beam, respectively, and a cross link is provided between the two tie rods.

[0012] The tie rods are inclined, and each tie rod has a mounting base on its inner side. The two ends of the cross link are connected to the mounting base by bolts.

[0013] The centerline of the balance beam is perpendicular to the centerline of the load-bearing platform, and the centerline of the lifting beam is parallel to the centerline of the load-bearing platform.

[0014] The connecting device includes an adapter seat, the upper part of which is connected to the lifting beam, and the lower part is detachably connected to the balance beam via an adapter.

[0015] The adapter includes a positioning sleeve, a plug pin is slidably disposed inside the positioning sleeve, an adjusting screw is provided at one end of the positioning sleeve, and one end of the adjusting screw extends to the outside of the positioning sleeve and is provided with a rotating handle.

[0016] Both the adapter and the balance beam are provided with through holes for use with the plug-in post, and the outer wall of the balance beam is provided with a flange for connection with the positioning sleeve.

[0017] A method for using an experimental apparatus for a special lifting tool for heavy equipment includes the following steps: Step 1: Place the load-bearing platform on the test site and place the protective platforms on both sides of the load-bearing platform; Step 2: Place the balance beam above the load-bearing platform, and place and build the spans on both sides of the balance beam. Step 3: Install four tie rods in sequence between the balance beam and the load-bearing platform, with each tie rod fixed at both ends by a pin. Step 4: Install the crossbar between the two tie rods to form a connecting rod; Step 5: Place the lifting beam above the balance beam, parallel to the load platform, and perpendicular to the balance beam in a cross shape. Step 6: The operator walks to the platform and uses the connecting device to connect the lifting beam to the balance beam. Step 7: Connect the truck crane to both ends of the lifting beam and remove the support module to prepare for the lifting operation; Step 8: Place the prepared weights on the loading platform and load the materials simulating the work scenario in 300t and 720t increments. Step 9: Both truck cranes are raised simultaneously to keep the loading platform level at all times. Step 10: When the lifting height reaches 20cm, maintain the weight for 5 minutes after each load. Step 11: On-site testing personnel inspect the steel structure of the lifting equipment to check for any abnormal conditions such as cracks or deformation. Step 12: Remove the lifting beam, balance beam and load-bearing platform in sequence. Replace each module quickly according to the usage scenario and then conduct the test operation again.

[0018] The beneficial effects of this invention are as follows: The experimental device for the special lifting tool for heavy equipment includes a lifting tool body and a support module. The lifting tool body includes a load-bearing platform, a lifting beam is provided above the load-bearing platform, a balance beam is provided between the lifting beam and the load-bearing platform, a connecting device for connecting the lifting beam is provided in the middle of the balance beam, and a connecting rod for connecting the load-bearing platform is provided at the bottom. Through the load-bearing platform, the balance beam, and the lifting beam, the actual heavy-load operation scenario of the heavy equipment lifting tool can be accurately simulated, and the structural strength, stability, and adaptability of each component of the lifting tool can be comprehensively tested. Moreover, each module of the device is detachable and replaceable, adapting to the experimental requirements of different specifications of lifting tools, providing reliable experimental support for the research and development and testing of heavy equipment lifting tools, and ensuring the safety and reliability of the lifting tool in actual operation. The connection points of the balance beam, lifting beam, and load-bearing platform all adopt movable connections such as pins, which can quickly complete the disassembly and installation of multiple modules without affecting the connection strength, facilitating continuous testing operations. The connecting rod consists of two symmetrically distributed tie rods, which are used to connect the balance beam and the load-bearing platform. A cross brace is installed between the two tie rods to strengthen the overall strength of the connecting rod, especially to improve the lateral shear resistance and stability of the tie rod, thereby stabilizing the entire equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the installation structure of the support module in this invention; Figure 3 This is a schematic diagram of the support module in this invention; Figure 4 This is a schematic diagram of the structure of the lifting device body in this invention; Figure 5 This is a sectional view of the lifting device body in this invention; Figure 6 This is a schematic diagram of the connecting rod in this invention; Figure 7 This is a schematic diagram of the adapter in the present invention; Figure 8 This is a schematic diagram of the adapter in this invention.

[0020] In the diagram: 1. Loading platform; 2. Lifting beam; 3. Balance beam; 4. Connecting rod; 5. Protective platform; 6. Cross platform; 7. Rectangular frame; 8. Support beam; 9. Longitudinal beam; 10. Guardrail; 11. Hinge seat; 12. Tie rod; 13. Horizontal connecting rod; 14. Mounting seat; 15. Bolt; 16. Adapter seat; 17. Adapter; 18. Positioning sleeve; 19. Insertion post; 20. Adjusting screw; 21. Rotating handle; 22. Through hole; 23. Flange. Detailed Implementation

[0021] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] like Figure 1-8As shown, the experimental device for a heavy equipment lifting device provided in this embodiment includes a lifting device body and a support module. The lifting device body includes a load-bearing platform 1, which serves as the foundation for supporting heavy materials (experimental weights). The load-bearing platform 1 includes a rectangular frame 7, which is welded from high-strength alloy steel and has sufficient load-bearing strength to meet the heavy-load experimental requirements of 300t, 720t, etc. Multiple parallel support beams 8 are arranged inside the rectangular frame 7. The support beams 8 are in direct contact with the material and are welded and fixed to the rectangular frame 7. A longitudinal beam 9 is arranged between two adjacent support beams 8. The longitudinal beam 9 is welded and fixed to the support beam 8 and the rectangular frame 7 respectively. The overall arrangement is in a grid pattern, which can reduce the weight of the entire load-bearing platform 1. The rectangular frame 7 has guardrails 10 at both ends, which are detachable bolted together. This prevents the weights from slipping during the experiment, ensuring experimental safety, and also facilitates the handling of the weights and disassembly of the load-bearing platform 1 after the experiment. The rectangular frame 7 has symmetrical hinge seats 11 on both sides for mounting the connecting rods 4. The hinge seats 11 are welded to the rectangular frame 7 and have hinge holes inside for rotatable connection with the connecting rods 4, ensuring that the connecting rods 4 can be flexibly installed and disassembled. The hinge seats 11 are located on the long side of the rectangular frame 7, which makes it easier to release stress and prevents stress concentration, thus effectively improving the service life of the equipment. A lifting beam 2 is installed above the load-bearing platform 1. The lifting beam 2 adopts a box-type steel structure, which is lightweight and has a strong load-bearing capacity. Lifting lugs are provided at both ends for connecting with the hook of the truck crane to realize the lifting operation of the entire lifting device. A balance beam 3 is provided between the lifting beam 2 and the load-bearing platform 1. A connecting device for connecting the lifting beam 2 is provided in the middle of the balance beam 3, and a connecting rod 4 for connecting the load-bearing platform 1 is provided at the bottom. The core function of the balance beam 3 is to transmit the lifting force and distribute the force evenly to various parts of the load-bearing platform 1 through the connecting rod 4, so as to ensure that the load-bearing platform 1 always remains in a horizontal state during the lifting process and avoids tilting that may cause experimental errors or safety hazards. The centerline of the balance beam 3 is perpendicular to the centerline of the load platform 1, and the centerline of the lifting beam 2 is parallel to the centerline of the load platform 1. That is, the lifting beam 2 and the balance beam 3 are distributed in a cross shape. This distribution method can make the lifting force evenly transmitted to the connecting rod 4 through the balance beam 3, and then act on the load platform 1, effectively improving the force balance of the lifting device body and reducing the phenomenon of the load platform overturning after excessive local force. The connecting rod 4 includes two symmetrically distributed tie rods 12. Each tie rod 12 is made of high-strength alloy and has good tensile and bending resistance. The two ends of each tie rod 12 are respectively hinged to the hinge seat 11 of the load-bearing platform 1 and the balance beam 3. The hinge is connected by a pin to ensure that the tie rod 12 can rotate flexibly around the hinge point to adapt to angle changes during the lifting process. A cross link 13 is provided between the two tie rods 12. The cross link 13 is used to enhance the integrity of the two tie rods 12, prevent the tie rods 12 from shifting or swaying during the stress process, and improve the structural stability of the connecting rod 4.

[0023] The tie rod 12 is inclined, which allows it to bear both axial tension and some radial pressure, thus optimizing the stress state. Each tie rod 12 has a mounting base 14 on its inner side, which is welded to the tie rod 12 and has bolt holes on its surface. The two ends of the cross link 13 are detachably connected to the mounting base 14 by bolts 15 or pins, which facilitates the installation, disassembly and replacement of the cross link 13 and is suitable for different specifications of load-bearing platforms 1.

[0024] It should be noted that the balance beam 3 has positioning plates at both ends that are connected to the tie rods 12. The positioning plates are trapezoidal and their width gradually increases from top to bottom. The lower part of the positioning plate is the distance between the upper ends of the two tie rods 12. The size of the positioning plate can be selected according to the height of the loaded items, thereby reducing the height of the entire hoisting equipment and improving stability.

[0025] The connecting device is used to achieve a detachable connection between the lifting beam 2 and the balance beam 3, facilitating assembly and disassembly during the experiment. It also allows adjustment of the relative positions of the lifting beam 2 and the balance beam 3 to adapt to different experimental requirements. Specifically, it includes an adapter 16, the upper part of which is detachably connected to the lifting beam 2 via a pin, and the lower part of which is detachably connected to the balance beam 3 via an adapter 17. The adapter 17 includes a positioning sleeve 18, which is made of seamless steel pipe and has a sliding insertion post 19 inside. The connecting post 19 can slide axially within the positioning sleeve 18 to achieve telescopic adjustment. One end of the positioning sleeve 18 is provided with an adjusting screw 20, which is threadedly connected to the positioning sleeve 18. One end of the adjusting screw 20 extends to the outside of the positioning sleeve 18 and is provided with a rotating handle 21. By rotating the rotating handle 21, the adjusting screw 20 can be driven to move axially, thereby pushing the connecting post 19 to slide within the positioning sleeve 18, realizing the telescopic control of the connecting post 19, and thus quickly completing the disassembly and connection between the lifting beam 2 and the balance beam 3.

[0026] Both the adapter 16 and the balance beam 3 are provided with through holes 22 for use with the plug-in post 19. The inner diameter of the through hole 22 is adapted to the outer diameter of the plug-in post 19 to ensure that the plug-in post 19 can be smoothly inserted into the through hole 22, thereby realizing the positioning connection between the adapter 16 and the balance beam 3. The outer wall of the balance beam 3 is provided with a flange 23 connected to the positioning sleeve 18. The flange 23 is welded and fixed to the balance beam 3. The positioning sleeve 18 is detachably connected to the flange 23 by bolts, which facilitates the installation, disassembly and maintenance of the adapter 17.

[0027] The support module provides support and protection during the assembly of the experimental device to ensure the safety of the operators. It includes protective platforms 5 located on both sides of the load-bearing platform 1. The protective platforms 5 adopt a steel structure frame for the operators to walk and climb, and facilitate the installation and disassembly of tie rods and crossbars. A cross platform 6 is installed between the two protective platforms 5 to provide working space for the operators to connect the balance beam 3 and the lifting beam 2. At the same time, the two cross platforms 6 can limit the balance beam 3 on both sides to prevent it from tilting or shifting.

[0028] The method of using the experimental apparatus based on the above-mentioned heavy equipment lifting tool includes the following steps: Step 1: Preliminary preparation and basic assembly. Place the load-bearing platform 1 stably on a flat experimental site, ensuring that the load-bearing platform 1 is not tilted or wobbling. Then place the protective platform 5 on both sides of the load-bearing platform 1 and adjust the position of the protective platform 5 to keep it close to the load-bearing platform 1 to ensure the stability of the operator during operation. At the same time, check the rectangular frame 7, support beam 8, longitudinal beam 9 and guardrail 10 of the load-bearing platform 1 to confirm that all components are firmly connected and there are no cracks, deformations or other abnormalities. Step 2: Install the balance beam and crossbeams. Place the balance beam 3 stably on top of the load-bearing platform 1 and adjust its position so that its centerline is perpendicular to the centerline of the load-bearing platform 1. Then place and build crossbeams 6 on both sides of the balance beam 3, ensuring that the crossbeams 6 are flush with the protective platform 5 and provide stable support for the balance beam 3 to prevent the balance beam 3 from shifting during subsequent assembly. Step 3: Connecting rod assembly. Install four tie rods 12 (two on each side, symmetrically distributed) between the balance beam 3 and the load platform 1. One end of each tie rod 12 is hinged to the hinge seats 11 on both sides of the load platform 1 via a pin, and the other end is hinged to the balance beam 3 via a pin. During installation, ensure that the pins are installed in place and fixed firmly. At the same time, adjust the tilt angle of the tie rod 12 to keep it within a reasonable range of 30°-45° to ensure uniform force distribution. Step 4: Install the horizontal connecting rod. Install the horizontal connecting rod 13 between the two tie rods 12 on both sides. Align the two ends of the horizontal connecting rod 13 with the mounting base 14 on the inner side of the tie rod 12. Fix the horizontal connecting rod 13 to the mounting base 14 with bolts 15 to ensure that the horizontal connecting rod 13 is installed firmly and without loosening, thereby forming a complete connecting rod 4 and enhancing the integrity and stability of the connecting rod 4. Step 5: Install and position the lifting beam. Place the lifting beam 2 stably above the balance beam 3. Adjust the position of the lifting beam 2 so that it is parallel to the load platform 1, and the center line of the lifting beam 2 is parallel to the center line of the load platform 1 and perpendicular to the balance beam 3 in a cross shape to ensure that the lifting beam 2 can evenly transmit the lifting force. Step 6: Connect the lifting beam and the balance beam. The operator, wearing safety protective equipment, walks to the platform 6 and uses the connecting device to connect the lifting beam 2 and the balance beam 3. The specific operation is as follows: rotate the rotating handle 21 of the adapter 17 to drive the adjusting screw 20 to move, thereby pushing the plug 19 to slide in the positioning sleeve 18, so that one end of the plug 19 is inserted into the through hole 22 on the adapter 16 and the other end is inserted into the through hole 22 on the balance beam 3, realizing the positioning connection between the adapter 16 and the balance beam 3, and thus completing the fixed connection between the lifting beam 2 and the balance beam 3. After connection, check the connection parts to ensure that there is no looseness or offset.

[0029] Step 7: Lifting preparation. Connect the truck crane to both ends of the lifting beam 2, and ensure that the crane hook is firmly connected to the lifting lugs at both ends of the lifting beam 2 without the risk of slippage. Then remove the support module (including the protective platform 5 and the cross platform 6), clear the obstacles around the test site, arrange for a dedicated person to monitor the site, and prepare for the lifting operation.

[0030] Step 8: Loading. Place the prepared standard weights stably on the loading platform 1 according to the preset weight. During the loading process, ensure that the weights are evenly distributed on the loading platform 1 to avoid excessive local load. The loading sequence is 300t and 720t in turn. After each loading is completed, check whether the weights are placed stably and whether there is any risk of tilting or slipping.

[0031] Step 9: Lifting operation. Start the two truck cranes and control them to lift synchronously. During the lifting process, observe the status of the load platform 1 in real time. Adjust the lifting speed and height of the cranes to ensure that the load platform 1 remains level and avoid any abnormal situations such as tilting or swaying.

[0032] Step 10: Load holding and detection. Control the truck crane to raise the lifting height of the load platform 1 to 20cm. This height simulates the minimum lifting height in actual operation of the spreader and can accurately detect the structural stability of the spreader under heavy load. After each load of the corresponding weight, maintain the weight for 5 minutes. During this period, arrange on-site experimental personnel to observe the status of each component of the spreader.

[0033] Step 11: Anomaly Detection. During the load holding period, on-site test personnel will use visual inspection, tapping and other methods to comprehensively inspect all parts of the lifting equipment steel structure. They will focus on checking whether there are any abnormalities such as cracks, deformation, or loosening in components such as the lifting beam 2, balance beam 3, load platform 1, connecting rod 4 and connecting device. If any abnormality is found, the experiment will be stopped immediately, the fault will be investigated and dealt with, and then the experiment will be repeated.

[0034] Step 12: Disassembly and secondary experiment. After the experiment is completed, control the truck crane to smoothly lower the load platform 1 to the test site and remove the weights. Then, disassemble the lifting beam 2, the balance beam 3, and the load platform 1 in sequence, avoiding collisions and damage to the parts during the disassembly process. According to the actual experimental requirements, after quickly replacing each module of the lifting device body (such as load platforms 1 of different specifications, balance beam 3, connecting rods 4, etc.), repeat the above steps 1-11 to carry out the secondary experiment to comprehensively test the performance of lifting devices of different specifications.

[0035] It should be noted that in the description of this invention, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0038] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. An experimental apparatus for a special lifting tool for heavy equipment, characterized in that, The lifting device includes a lifting body and a support module. The lifting body includes a load-bearing platform (1), a lifting beam (2) is provided above the load-bearing platform (1), a balance beam (3) is provided between the lifting beam (2) and the load-bearing platform (1), a connecting device for connecting the lifting beam (2) is provided in the middle of the balance beam (3), and a connecting rod (4) for connecting the load-bearing platform (1) is provided at the bottom. The support module includes protective platforms (5) located on both sides of the load-bearing platform (1), and a cross platform (6) located on both sides of the balance beam (3) is provided between the two protective platforms (5).

2. The experimental apparatus for the special lifting tool for heavy equipment according to claim 1, characterized in that, The load-bearing platform (1) includes a rectangular frame (7), and multiple parallel support beams (8) are provided inside the rectangular frame (7), with a longitudinal crossbeam (9) between two adjacent support beams (8).

3. The experimental apparatus for the special lifting tool for heavy equipment according to claim 2, characterized in that, The rectangular frame (7) is provided with guardrails (10) at both ends, and hinge seats (11) for installing connecting rods (4) are provided on both sides of the rectangular frame (7).

4. The experimental apparatus for the special lifting tool for heavy equipment according to claim 1, characterized in that, The connecting rod (4) includes two symmetrically distributed tie rods (12), with each tie rod (12) hinged at both ends to the load platform (1) and the balance beam (3), and a cross link (13) is provided between the two tie rods (12).

5. The experimental apparatus for the special lifting tool for heavy equipment according to claim 4, characterized in that, The tie rod (12) is inclined, and each tie rod (12) has a mounting seat (14) on its inner side. The two ends of the cross link (13) are connected to the mounting seat (14) by bolts (15).

6. The experimental apparatus for the special lifting tool for heavy equipment according to claim 1, characterized in that, The centerline of the balance beam (3) is perpendicular to the centerline of the load platform (1), and the centerline of the lifting beam (2) is parallel to the centerline of the load platform (1).

7. The experimental apparatus for the special lifting tool for heavy equipment according to claim 1, characterized in that, The connecting device includes an adapter (16), the upper part of which is connected to the lifting beam (2), and the lower part is detachably connected to the balance beam (3) via an adapter (17).

8. The experimental apparatus for the special lifting tool for heavy equipment according to claim 7, characterized in that, The adapter (17) includes a positioning sleeve (18), a plug post (19) is slidably disposed inside the positioning sleeve (18), an adjusting screw (20) is provided at one end of the positioning sleeve (18), and one end of the adjusting screw (20) extends to the outside of the positioning sleeve (18) and is provided with a rotating handle (21).

9. The experimental apparatus for the special lifting tool for heavy equipment according to claim 8, characterized in that, Both the adapter (16) and the balance beam (3) are provided with through holes (22) for use with the plug-in post (19), and the outer side wall of the balance beam (3) is provided with a flange (23) for connection with the positioning sleeve (18).

10. A method for using an experimental apparatus for a special lifting tool for heavy equipment, characterized in that, Includes the following steps: Step 1: Place the load-bearing platform (1) on the experimental site and place the protective platform (5) on both sides of the load-bearing platform (1); Step 2: Place the balance beam (3) above the load platform (1) and place the erection platform (6) on both sides of the balance beam (3). Step 3: Install four tie rods (12) in sequence between the balance beam (3) and the load platform (1), and fix both ends of each tie rod (12) by a pin. Step 4: Install the horizontal connecting rod (13) between the two tie rods (12) to form the connecting rod (4). Step 5: Place the lifting beam (2) above the balance beam (3) and place it parallel to the load platform (1), with the balance beam (3) arranged in a cross shape perpendicular to it. Step 6: The operator walks to the platform (6) and uses the connecting device to connect the lifting beam (2) to the balance beam (3); Step 7: Connect the truck crane to both ends of the lifting beam (2) and remove the support module to prepare for the lifting operation; Step 8: Place the prepared weights on the load platform (1) and load the materials of the simulated operation scenario in sequence according to 300t and 720t. Step 9: The two truck cranes are raised simultaneously to keep the load platform (1) horizontal at all times; Step 10: When the lifting height reaches 20cm, maintain the weight for 5 minutes after each load. Step 11: On-site testing personnel inspect the steel structure of the lifting equipment to check for any abnormal conditions such as cracks or deformation. Step 12: Remove the lifting beam (2), balance beam (3) and load platform (1) in sequence. After quickly replacing each module according to the usage scenario, conduct the experiment again.

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