Hoisting mechanism for steel transportation and using method

Abstract

The invention relates to the technical field of steel transportation and hoisting, and discloses a hoisting mechanism for steel transportation and a using method. The problems that a traditional steel lifting appliance depends on manual operation, cannot reset automatically, and is low in safety and unknowable in state are solved. The mechanism comprises a self-locking hoisting clamp, wherein a gravity self-locking and spring resetting linkage mechanism is formed by a hoisting frame main body, a main connecting rod, a connecting block, a movable block and a spring; the opening of the clamping arm is adjustable through the adjusting piece; inclination angle, load, approaching, clamping force and displacement sensors are integrated, and state sensing is achieved; during use, steel is automatically clamped by virtue of the gravity, and is driven to reset by virtue of a spring after being unloaded, so that the device is suitable for efficient, safe and intelligent hoisting of long steel such as round steel and square steel; the hoisting mechanism does not need an external power source, is simple and reliable in structure, and can stably operate for a long time in severe industrial environments such as high temperature and dustiness; and the two clamps are symmetrically arranged below the hoisting equipment, so that the long steel is balanced in stress and stable in posture in the hoisting process.

Description

Technical Field

[0001] This invention relates to the field of steel transportation and hoisting technology, specifically to a hoisting mechanism and its usage method for steel transportation. Background Technology

[0002] In the processes of steel smelting, rolling, warehousing, and logistics, the hoisting of long steel products such as round bars, square bars, and rods is a common procedure. Traditional hoisting methods typically use wire ropes, chains, or C-hooks in conjunction with manual hooking and unhooking operations. These methods have significant drawbacks: operators must be close to the high temperature and heavy steel to manually hook and hang the steel, posing safety risks such as burns and crushing injuries; the wire ropes are prone to slippage during hoisting, causing the steel to tilt or even fall; and unloading requires manual prying or unhooking again, resulting in high labor intensity and low efficiency.

[0003] To improve safety, some companies use hydraulic or pneumatic clamps, which use an external power source to drive the clamping arms to close. However, such devices are complex in structure, rely on energy supply, and their reliability is significantly reduced in high-temperature, dusty, or explosion-proof environments. Furthermore, a power outage or pipeline leak may cause clamping failure, posing a serious safety hazard. In addition, hydraulic systems have high maintenance costs and are not suitable for large-volume, fast-paced ordinary steel transfer scenarios.

[0004] Although some mechanical self-locking lifting devices attempt to use gravity to achieve clamping, their structures often lack effective reset mechanisms and motion guides. After unloading, the clamping arms often fail to open automatically due to friction or deformation, requiring manual intervention. At the same time, the clamping force is not adjustable, making it difficult to adapt to different specifications of steel. After long-term use, the hinged parts are prone to loosening, resulting in poor clamping stability.

[0005] Therefore, there is an urgent need for a steel hoisting mechanism that is simple in structure, requires no external power, has reliable self-locking and automatic reset functions, and can adapt to various working conditions. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a lifting mechanism and method for transporting steel. It has advantages such as simple structure, no need for external power, reliable gravity self-locking, stable spring return, adjustable clamp opening, and support for multi-sensor status monitoring. It solves the problems of traditional lifting devices relying on manual operation, inability to automatically reset, low safety, and unknown status. It also has advantages such as simple structure, maintenance-free operation, high reliability, and intelligent operation.

[0008] (II) Technical Solution

[0009] To achieve the above-mentioned objectives of "simple structure, no need for external power, and reliable gravity self-locking", the present invention provides the following technical solution: a lifting mechanism for steel transportation, including a self-locking lifting clamp, wherein the self-locking lifting clamp includes a lifting frame body, two hinge seats, two main connecting rods, a connecting block, two hinge shafts, two clamp arm connecting sections, a movable block, a spring, two adjusting components, and two clamp arms;

[0010] Hinges are fixedly installed on both sides of the bottom of the main body of the hanger. One end of each of the two main connecting rods is rotatably installed in the corresponding hinge. The connecting block is connected between the ends of the two main connecting rods. Hinges are fixedly installed on both sides of the inside of the connecting block. One end of each of the two clamping arm connecting sections is rotatably installed on the corresponding hinge. A movable block is movably installed on the connecting block. One end of the spring is fixedly connected to the bottom of the main body of the hanger, and the other end is fixedly connected to the movable block. The other ends of the two clamping arm connecting sections are connected to adjusting components, and the two clamping arms are connected to the corresponding adjusting components.

[0011] A lifting lug is fixedly installed at the top center of the main body of the hanger.

[0012] Preferably, the ends of the two main connecting rods furthest from the hinge seat are rotatably mounted on the surface of the hinge shaft together with one end of the clamp arm connecting section.

[0013] Preferably, the connecting block has a movable groove inside, and a movable block is slidably installed inside the movable groove. The side of the spring away from the main body of the hanger is fixedly connected to the surface of the movable block.

[0014] Preferably, the top of the movable block is provided with a threaded groove, and the bottom of the spring is fixedly installed with a screw extending into the threaded groove. A washer is sleeved on the surface of the screw, and the washer fits against the inner wall of the threaded groove.

[0015] Preferably, both adjusting components include a U-shaped plate and adjusting bolts, and the ends of the two clamping arm connecting sections are fixedly installed with U-shaped plates. Clamping arms are inserted into the interior of both U-shaped plates, and the two adjusting bolts pass through the U-shaped plates and extend into the interior of the clamping arms.

[0016] Preferably, the inner walls of both clamping arms are covered with cushioning pads, and both clamping arms are designed in an arc shape.

[0017] Preferably, an angle sensor is fixedly installed on the surface of the main body of the hanger, a load sensor is installed on the lug, a proximity switch and a clamping force sensor are embedded in the inner wall of both clamping arms, and a displacement sensor is fixedly installed on the surface of the movable block.

[0018] Preferably, it also includes lifting equipment, which is connected to two self-locking lifting clamps, each of which is connected to the lifting equipment via its own lifting lug.

[0019] A method of using a hoisting mechanism for transporting steel includes the following steps;

[0020] S1: Connect the lifting lugs of the two self-locking lifting clamps to the lifting equipment respectively;

[0021] S2: In the no-load state, the spring is in the stretched state, the movable block is located at the upper part of the movable groove inside the connecting block, the two clamping arms are in the open state, the displacement sensor outputs the first position signal, and the proximity switch outputs the no-object signal.

[0022] S3: Place the steel to be hoisted between the two clamping arms. The proximity switch detects the steel and outputs a signal indicating that there is a material.

[0023] S4: Start the lifting equipment to rise. The weight of the steel acts on the two clamping arms, pushing the connecting section of the two clamping arms to rotate around the hinge axis.

[0024] S5: The two main connecting rods rotate around the hinge seat, causing the movable block to move downward along the movable groove of the connecting block, the spring is further stretched, the displacement sensor outputs the second position signal, and the clamping force sensor outputs the clamping signal.

[0025] S6: The two clamping arms close inward to clamp the steel. The load sensor outputs a load signal, and the tilt sensor outputs a tilt angle signal of the main body of the hanger.

[0026] S7: After the lifting equipment hoists the steel to the target position, it descends and the steel contacts the support surface. The gravity is relieved from the clamping arm. The load sensor outputs a load reduction signal and the clamping force sensor outputs a release signal.

[0027] S8: The spring rebounds, pulling the movable block upward along the movable groove. The two main connecting rods rotate in the opposite direction around the hinge seat, the two clamping arms return to the open state, the displacement sensor resumes outputting the first position signal, and the proximity switch resumes outputting the no-object signal.

[0028] (III) Beneficial Effects

[0029] Compared with the prior art, the present invention provides a lifting mechanism and method for transporting steel, which has the following advantages:

[0030] 1. This invention slides the movable block into the movable groove inside the connecting block and uses a spring to connect the main body of the hanger and the movable block, so that the clamping arm automatically opens under the tension of the spring when unloaded and reliably resets after unloading, avoiding manual prying operation.

[0031] 2. This invention forms a gravity-driven lever self-locking mechanism by rotating the main connecting rod and the clamping arm connecting section together on a hinge shaft fixed on the connecting block, thereby achieving reliable clamping without an external power source and improving inherent safety in high-temperature and dusty environments.

[0032] 3. By setting a U-shaped plate and an adjusting bolt that passes through the clamping arm in the adjusting component, the position of the clamping arm can be adjusted, realizing universal compatibility with long steel materials such as round steel and square steel of different diameters, and improving the utilization rate of the equipment.

[0033] 4. This invention integrates tilt sensors, load sensors, proximity switches, clamping force sensors, and displacement sensors to acquire real-time information on the lifting device's posture, load, clamping status, and the position of the moving block, providing a complete state perception foundation for intelligent lifting systems. Attached Figure Description

[0034] Figure 1 This is a perspective view of the self-locking lifting clamp structure of the present invention;

[0035] Figure 2 This is a schematic diagram showing the connection between the crane and the self-locking lifting clamp structure of the present invention;

[0036] Figure 3 This is a schematic diagram of the self-locking lifting clamp structure of the present invention;

[0037] Figure 4 This is a cross-sectional view of the connection structure between the spring and the movable block of the present invention;

[0038] Figure 5 For the present invention Figure 1 Enlarged view of the structure at point A in the middle.

[0039] In the diagram: 1. Lifting equipment; 2. Self-locking lifting clamp; 21. Main body of the lifting frame; 22. Hinge seat; 23. Main connecting rod; 24. Connecting block; 25. Hinge shaft; 26. Moving block; 261. Threaded groove; 262. Screw; 263. Washer; 27. Spring; 28. Clamping arm connecting section; 29. ​​Adjusting component; 291. U-shaped plate; 292. Adjusting bolt; 20. Clamping arm; 3. Lifting lug; 4. Tilt sensor; 5. Load sensor; 6. Clamping force sensor; 7. Proximity switch; 8. Displacement sensor. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] read Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a lifting mechanism for transporting steel includes a self-locking lifting clamp 2. The self-locking lifting clamp 2 includes a lifting frame body 21, two hinge seats 22, two main connecting rods 23, a connecting block 24, two hinge shafts 25, two clamp arm connecting sections 28, a movable block 26, a spring 27, two adjusting components 29, and two clamp arms 20.

[0042] Hinges 22 are fixedly installed on both sides of the bottom of the main body 21 of the hanger. One end of each of the two main connecting rods 23 is rotatably installed in the corresponding hinge 22. A connecting block 24 is connected between the ends of the two main connecting rods 23. Hinges 25 are fixedly installed on both sides of the inside of the connecting block 24. One end of each of the two clamping arm connecting sections 28 is rotatably installed on the corresponding hinge 25. The inside of the connecting block 24 is provided with a movable groove. A movable block 26 is slidably installed in the movable groove. One end of the spring 27 is fixedly connected to the bottom of the main body 21 of the hanger, and the other end is fixedly connected to the movable block 26. The other ends of the two clamping arm connecting sections 28 are respectively connected to adjusting members 29. The two clamping arms 20 are respectively connected to the corresponding adjusting members 29.

[0043] In this embodiment, the self-locking lifting clamp 2 of the present invention achieves automatic clamping and release based on the mechanical linkage principle of gravity drive and spring 27 reset. In the unloaded state, the spring 27 is in the pre-stretched state, and its lower end applies an upward pulling force to the movable block 26, so that the movable block 26 is located in the upper part of the movable groove inside the connecting block 24. Since the movable block 26 and the main connecting rod 23 form a linkage relationship through the connecting block 24, this position causes the two main connecting rods 23 to open outward around the hinge seat 22, thereby driving the clamp arm connecting section 28 to rotate around the hinge axis 25, and finally making the two clamp arms 20 in the open state, which is convenient for inserting steel.

[0044] After the steel to be hoisted is placed between the two clamping arms 20, the lifting equipment 1 starts to rise. The steel, due to its own weight, presses down on the clamping arms 20, pushing the clamping arm connecting section 28 to rotate inward around the hinge shaft 25. The hinge shaft 25 is fixedly installed inside the connecting block 24, so this rotation is transmitted to the main connecting rod 23 through the clamping arm connecting section 28, forcing the two main connecting rods 23 to retract inward around the hinge seat 22. At the same time, the movement of the main connecting rod 23 pushes the movable block 26 to move downward along the movable groove in the connecting block 24, causing the spring 27 to be further stretched. As the movable block 26 moves downward, the clamping arms 20 continue to close inward until they firmly clamp the steel, forming a self-locking state. At this time, the weight of the steel is transmitted to the main body of the lifting frame 21 through the clamping arms 20, the clamping arm connecting section 28, and the main connecting rod 23, while the connecting block 24, as the central support and guide carrier, ensures that the entire X-shaped lever mechanism moves stably and without deviation.

[0045] When the steel is transported to the target position and descends to contact the support surface, its weight is released from the clamping arm 20. The spring 27 retracts under the action of elastic restoring force, pulling the movable block 26 to move upward along the movable groove of the connecting block 24. The upward movement of the movable block 26 pushes the main connecting rod 23 to rotate outward around the hinge seat 22 in the opposite direction, thereby driving the clamping arm connecting section 28 to rotate in the opposite direction around the hinge axis 25, and finally causing the two clamping arms 20 to return to the open state, completing the automatic release.

[0046] Throughout the process, the connecting block 24 not only serves as the mounting base for the hinge shaft 25, but also provides vertical guidance for the movable block 26 through its internal movable groove, ensuring accurate movement trajectory and avoiding jamming or lateral deviation, thereby ensuring the reliability of self-locking and reset actions.

[0047] like Figure 2 As shown, the lifting mechanism of the present invention also includes a lifting device 1, which is a bridge crane, gantry crane, overhead crane or truck crane or other lifting device with a hook; two self-locking lifting clamps 2 are connected to the hook of the lifting device 1, and the two self-locking lifting clamps 2 are mechanically connected to the lifting device 1 through the lifting lugs 3 on the top of their respective lifting frame bodies 21.

[0048] Specifically, each lifting lug 3 is connected to the hook of the lifting equipment 1 by means of shackle, pin or direct hook, so that two self-locking lifting clamps 2 are symmetrically arranged below the lifting equipment 1. This double clamp arrangement is suitable for the balanced lifting of long steel: the two self-locking lifting clamps 2 respectively clamp the two ends or sides of the steel. During the lifting process, they act independently through their respective gravity self-locking mechanisms, while being lifted uniformly by the lifting equipment 1, to ensure that the steel is subjected to uniform force and has a stable posture, and to prevent tilting or slipping.

[0049] like Figure 1 and Figure 3 As shown, in this embodiment, the top of the movable block 26 is provided with a threaded groove 261, which is arranged vertically and is used to cooperate with the connection structure of the spring 27. The spring 27 is a tension spring, with its upper end fixedly connected to the bottom of the hanger body 21 and its lower end fixedly installed with a screw 262. The external thread of the screw 262 is adapted to the internal thread of the threaded groove 261, so that the screw 262 can be screwed into and fastened inside the threaded groove 261, thereby forming a rigid connection between the lower end of the spring 27 and the movable block 26.

[0050] Furthermore, a washer 263 is fitted onto the surface of the screw 262, and the washer 263 is located between the end of the screw 262 and the top surface of the movable block 26. When the screw 262 is screwed into the threaded groove 261 to a preset depth, the washer 263 is pressed against the top surface of the movable block 26, and its outer edge is in contact with the port of the threaded groove 261 or the top surface of the movable block 26, which increases the contact area, disperses the compressive stress, and prevents the screw 262 from loosening.

[0051] Through this connection structure, the axial tension of the spring 27 can be directly and reliably transmitted to the movable block 26, driving it to slide up and down in the movable groove inside the connecting block 24; at the same time, by adjusting the depth of the screw 262 screwed into the threaded groove 261, the initial pretension of the spring 27 can be adjusted, thereby adapting to steel of different weight specifications, ensuring that the clamping arm 20 opens stably when unloaded and reliably self-locks when loaded.

[0052] It should be noted that spring 27 is made of high fatigue strength alloy spring steel and has been shot peened to strengthen it. Its design life is no less than 50,000 lifting cycles.

[0053] Specifically, the adjusting bolt 292 passes through the side wall of the U-shaped plate 291 and extends into the interior of the clamping arm 20 or abuts against its outer surface. By tightening or loosening the adjusting bolt 292, the relative position of the clamping arm 20 within the U-shaped plate 291 can be changed, thereby adjusting the opening distance between the two clamping arms 20.

[0054] like Figure 1 , Figure 3 and Figure 5 As shown, both adjusting components 29 include a U-shaped plate 291 and adjusting bolts 292. The ends of the two clamping arm connecting sections 28 are fixedly installed with U-shaped plates 291. The clamping arms 20 are inserted into the interior of the two U-shaped plates 291. The two adjusting bolts 292 pass through the U-shaped plates 291 and extend into the interior of the clamping arms 20.

[0055] Specifically, the adjusting bolt 292 passes through the side wall of the U-shaped plate 291 and extends into the interior of the clamping arm 20 or abuts against its outer surface. By tightening or loosening the adjusting bolt 292, the relative position of the clamping arm 20 within the U-shaped plate 291 can be changed, thereby adjusting the opening distance between the two clamping arms 20.

[0056] The purpose of this structure is to make the position of the clamping arm 20 adjustable to accommodate steel of different diameters or cross-sectional sizes. For example, when lifting Φ50mm round steel, the adjusting bolt 292 can be tightened to a smaller opening; when lifting Φ100mm round steel or square steel, the adjusting bolt 292 can be loosened and the clamping arm 20 moved to a larger distance before being re-locked. Thus, the same set of self-locking lifting clamps 2 can be compatible with workpieces of various specifications, improving the versatility and efficiency of the equipment.

[0057] In addition, the U-shaped plate 291 provides lateral restraint for the clamping arm 20 to prevent it from swinging or coming off during hoisting, while the adjusting bolt 292 provides reliable clamping force to ensure that the clamping arm 20 does not shift under load, thus ensuring hoisting safety.

[0058] like Figure 1As shown in this embodiment, in order to realize real-time status perception and intelligent monitoring of the hoisting process, an inclination sensor 4 is fixedly installed on the surface of the main body 21 of the hoisting frame to detect the spatial posture of the main body 21 of the hoisting frame during the hoisting process; when the hoisting frame tilts, the inclination sensor 4 outputs a corresponding angle signal, which can be used to determine whether the steel is balanced or whether there is a risk of off-center loading.

[0059] A load sensor 5 is installed on the lifting lug 3. The load sensor 5 is located in the connection area between the lifting lug 3 and the lifting equipment 1. It is used to monitor the load transmitted during the lifting process in real time. When the clamping arm 20 clamps the steel and lifts it, the load sensor 5 outputs an electrical signal corresponding to the weight of the steel, which can be used for overload warning or lifting data recording.

[0060] Both clamping arms 20 have a proximity switch 7 and a clamping force sensor 6 embedded in their inner walls.

[0061] The proximity switch 7 is used to detect whether there is steel between the clamping arms 20. When the steel is placed in, the proximity switch 7 is triggered and outputs a "material present" signal, which is one of the conditions for starting the hoisting process. The clamping force sensor 6 is used to detect whether the clamping arms 20 have been fully closed and clamped the steel. When the clamping force reaches the set threshold, the clamping force sensor 6 outputs a "clamping in place" signal, indicating that the self-locking mechanism has been effectively activated.

[0062] In addition, a displacement sensor 8 is fixedly installed on the surface of the movable block 26. The displacement sensor 8 is used to monitor the real-time position of the movable block 26 in the movable groove inside the connecting block 24. When the movable block 26 is in the upper position, the displacement sensor 8 outputs an "open" signal. When the movable block 26 moves down to the lower position, it outputs a "closed" signal, thereby indirectly reflecting the opening and closing state of the clamping arm 20.

[0063] A method of using a hoisting mechanism for transporting steel includes the following steps;

[0064] S1: Connect the lifting lugs 3 of the two self-locking lifting clamps 2 to the lifting equipment 1 respectively;

[0065] S2: In the no-load state, the spring 27 is in the stretched state, the movable block 26 is located at the upper part of the movable groove inside the connecting block 24, the two clamping arms 20 are in the open state, the displacement sensor 8 outputs the first position signal, and the proximity switch 7 outputs the no-object signal.

[0066] S3: Place the steel to be hoisted between the two clamping arms 20. The proximity switch 7 detects the steel and outputs a signal indicating that there is a material.

[0067] S4: Start the lifting equipment 1 to rise. The weight of the steel acts on the two clamping arms 20, pushing the connecting section 28 of the two clamping arms to rotate around the hinge axis 25.

[0068] S5: The two main connecting rods 23 rotate around the hinge seat 22, causing the movable block 26 to move downward along the movable groove of the connecting block 24, the spring 27 is further stretched, the displacement sensor 8 outputs the second position signal, and the clamping force sensor 6 outputs the clamping signal.

[0069] S6: The two clamping arms 20 close inward to clamp the steel. The load sensor 5 outputs a load signal, and the tilt sensor 4 outputs a tilt angle signal of the hanger body 21.

[0070] S7: After the lifting equipment 1 hoists the steel to the target position, it descends and the steel contacts the support surface. The gravity is relieved from the clamping arm 20. The load sensor 5 outputs a load reduction signal and the clamping force sensor 6 outputs a release signal.

[0071] S8: Spring 27 rebounds, pulling movable block 26 to move upward along movable groove, two main connecting rods 23 rotate in opposite directions around hinge seat 22, two clamping arms 20 return to open state, displacement sensor 8 resumes output of first position signal, and proximity switch 7 resumes output of no object signal.

[0072] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0073] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting mechanism for transporting steel, comprising a self-locking lifting clamp (2), characterized in that: The self-locking lifting clamp (2) includes a main body (21), two hinge seats (22), two main connecting rods (23), a connecting block (24), two hinge shafts (25), two clamp arm connecting sections (28), a movable block (26), a spring (27), two adjusting parts (29), and two clamp arms (20). Hinges (22) are fixedly installed on both sides of the bottom of the main body (21) of the hanger. One end of each of the two main connecting rods (23) is rotatably installed in the corresponding hinge (22). The connecting block (24) is connected between the ends of the two main connecting rods (23). Hinges (25) are fixedly installed on both sides of the inside of the connecting block (24). One end of each of the two clamping arm connecting sections (28) is rotatably installed on the corresponding hinge (25). A movable block (26) is movably installed on the connecting block (24). One end of the spring (27) is fixedly connected to the bottom of the main body (21) of the hanger, and the other end is fixedly connected to the movable block (26). The other ends of the two clamping arm connecting sections (28) are connected to adjustment members (29). The two clamping arms (20) are connected to the corresponding adjustment members (29). A lifting lug (3) is fixedly installed at the top center of the main body (21) of the hanger.

2. The hoisting mechanism for transporting steel according to claim 1, characterized in that: The ends of the two main connecting rods (23) away from the hinge seat (22) are rotatably mounted on the surface of the hinge shaft (25) together with one end of the clamp arm connecting section (28).

3. The hoisting mechanism for transporting steel according to claim 1, characterized in that: The connecting block (24) has an open groove inside, and a movable block (26) is slidably installed inside the groove. The side of the spring (27) away from the main body (21) of the hanger is fixedly connected to the surface of the movable block (26).

4. A hoisting mechanism for transporting steel according to claim 1, characterized in that: The top of the movable block (26) is provided with a threaded groove (261), and the bottom of the spring (27) is fixedly installed with a screw (262) extending into the threaded groove (261). A washer (263) is sleeved on the surface of the screw (262), and the washer (263) fits against the inner wall of the threaded groove (261).

5. A hoisting mechanism for transporting steel according to claim 1, characterized in that: Both of the adjusting components (29) include a U-shaped plate (291) and an adjusting bolt (292). The ends of the two clamping arm connecting sections (28) are fixedly installed with U-shaped plates (291). The clamping arms (20) are inserted into the interior of the two U-shaped plates (291). The two adjusting bolts (292) penetrate the U-shaped plates (291) and extend into the interior of the clamping arms (20).

6. A hoisting mechanism for transporting steel according to claim 1, characterized in that: The inner walls of both clamping arms (20) are covered with cushioning pads, and both clamping arms (20) are designed in an arc shape.

7. A hoisting mechanism for transporting steel according to claim 1, characterized in that: An angle sensor (4) is fixedly installed on the surface of the main body (21) of the hanger, a load sensor (5) is installed on the lug (3), a proximity switch (7) and a clamping force sensor (6) are embedded in the inner wall of the two clamping arms (20), and a displacement sensor (8) is fixedly installed on the surface of the movable block (26).

8. A hoisting mechanism for transporting steel according to claim 1, characterized in that: It also includes a lifting device (1), which is connected to two self-locking lifting clamps (2), and the two self-locking lifting clamps (2) are respectively connected to the lifting device (1) through their respective lifting lugs (3).

9. A method of using a lifting mechanism for transporting steel, based on the lifting mechanism for transporting steel as described in any one of claims 1-8, characterized in that: Includes the following steps; S1: Connect the lifting lugs (3) of the two self-locking lifting clamps (2) to the lifting equipment (1) respectively; S2: In the no-load state, the spring (27) is in the stretched state, the movable block (26) is located at the upper part of the movable groove inside the connecting block (24), the two clamping arms (20) are in the open state, the displacement sensor (8) outputs the first position signal, and the proximity switch (7) outputs the no-object signal. S3: Place the steel to be hoisted between the two clamps (20), and the proximity switch (7) detects the steel and outputs a signal indicating that there is a material. S4: Start the lifting equipment (1) to rise, the weight of the steel acts on the two clamping arms (20), and push the connecting section (28) of the two clamping arms to rotate around the hinge axis (25); S5: The two main connecting rods (23) rotate around the hinge seat (22), causing the movable block (26) to move downward along the movable groove of the connecting block (24), the spring (27) is further stretched, the displacement sensor (8) outputs the second position signal, and the clamping force sensor (6) outputs the clamping signal. S6: The two clamping arms (20) close inward to clamp the steel, the load sensor (5) outputs the load signal, and the tilt sensor (4) outputs the tilt angle signal of the main body of the hanger (21); S7: The lifting equipment (1) lowers after hoisting the steel to the target position. The steel contacts the support surface, and the gravity is removed from the clamping arm (20). The load sensor (5) outputs a load reduction signal, and the clamping force sensor (6) outputs a release signal. S8: The spring (27) rebounds, pulling the movable block (26) to move upward along the movable groove. The two main connecting rods (23) rotate in opposite directions around the hinge seat (22). The two clamping arms (20) return to the open state. The displacement sensor (8) resumes outputting the first position signal. The proximity switch (7) resumes outputting the no-object signal.

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