Lifting appliance for steel structure construction and lifting method

Abstract

The invention discloses a lifting appliance for steel structure construction and a lifting method, and relates to the technical field of steel structure lifting. Comprising two mounting plates which are symmetrically arranged and fixedly connected through bolts, a rotating wheel set rotationally connected between the two mounting plates through a rotating wheel shaft and a connecting block rotationally connected between the two mounting plates through a connecting shaft and located above the rotating wheel set, an upper lifting lug assembly is mounted on the connecting block, and the upper lifting lug assembly comprises a main lifting lug and a lower lifting lug; a reinforcing lifting lug; the reinforced lifting lugs are additionally arranged on the two sides of the main lifting lug, so that a reinforced lifting lug structure is formed, on one hand, the load performance of the lifting lugs can be enhanced, the deformation and cracking probability of the lifting lug structure is reduced, and on the other hand, after a single lifting lug is damaged, the other two lifting lugs can also play a load role together; the overall reliability and safety of the lifting lug structure are improved; in addition, the improved lifting lug structure is changed, stress concentration of the main lifting lug can be weakened, and therefore the lifting lug structure has higher load performance.

Description

Technical Field

[0001] This invention relates to the field of steel structure hoisting technology, and in particular to a hoisting tool and hoisting method for steel structure construction. Background Technology

[0002] Specialized lifting equipment is usually required during steel structure hoisting operations. For example, the hoisting pulley is a simple lifting machine that can be used on steel bridge construction sites to vertically lift heavy objects using sprockets or drums. Hoisting pulleys can be divided into four types according to the connection method between the pulley and the load: hook pulley, chain pulley, ring pulley, and frame pulley. They are characterized by light weight, compact structure, and ease of use, and are suitable for simple lifting work in construction.

[0003] A search revealed a construction crane trolley disclosed in patent document CN221093418U, comprising a pulley seat, a lifting hook, and a connecting column installed between the pulley seat and the lifting hook. A support frame is provided on the outer side of the connecting column. The support frame includes a stabilizing ring, a support mechanism, and a moving mechanism. The support mechanism includes a reinforcing plate, a connecting steel rope, and a support block. The stabilizing ring is installed on the outer surface of the connecting column, and the reinforcing plate is installed on the outer surface of the stabilizing ring. A fixed short column is provided inside the reinforcing plate. The lifting hook is embedded inside the support block to support and limit its movement. One end of the support block is firmly secured by the connecting steel rope. A positioning column penetrates the limiting block to position it. The other end of the support block is fixed, and both ends of the support block are supported, resulting in a balanced force distribution. This design supports the lifting hook and prevents deformation or cracking of the hook due to heavy loads.

[0004] Based on the above search and combined with existing technology, it was found that the existing hoisting trolley structure increases the load of the upper lifting lug (i.e., the aforementioned hook) by adding a support frame structure to the outside of the upper lifting lug, thereby enhancing the safety of the upper lifting lug. However, the structure of the upper lifting lug itself has not changed, and there is a stress concentration problem. Therefore, the upper lifting lug may still deform or crack under load. The structural strength of the upper lifting lug itself is insufficient, which poses certain safety hazards. Therefore, a lifting tool and hoisting method for steel structure construction is needed. Summary of the Invention

[0005] The purpose of this application is to provide a lifting tool and lifting method for steel structure construction to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a lifting device for steel structure construction, comprising two symmetrically arranged mounting plates fixedly connected by bolts, a wheel assembly rotatably connected between the two mounting plates via a wheel axle, and a connecting block rotatably connected between the two mounting plates and located above the wheel assembly via a connecting shaft. An upper lifting lug assembly is mounted on the connecting block, and the upper lifting lug assembly includes: Main lug; The main lifting lugs are reinforced with two lugs that are symmetrically distributed on both sides of the main lifting lug about the center line of the main lifting lug. The two lugs are respectively pressed against the two sides of the main lifting lug on the side closest to each other. Connecting ears are provided in multiple ways and are fixed to the main lifting lug and two reinforcing lifting lugs respectively. The multiple connecting ears are divided into several groups. The multiple connecting ears in each group are horizontally aligned and fixed by bolts. The multiple groups of connecting ears are distributed on the outside of the main lifting lug or the reinforcing lifting lug.

[0007] As a further supplement to this solution, the hook necks of the main lifting lug and the two reinforcing lifting lugs together form a cylinder. The reinforcing lifting lugs are located at the lower end of the connecting block and form a tapered reinforcing block. The tapered reinforcing block is fixedly sleeved on the outside of the hook head of the main lifting lug. The tapered reinforcing block is a multi-stage frustum.

[0008] As a further supplement to this scheme, stress diffusion grooves are formed between the multi-stage frustums of the tapered reinforcement block. The cross-sectional area of ​​the stress diffusion grooves is more than half of the cross-sectional area of ​​the tapered reinforcement block at that location, and the multi-stage frustums of the tapered reinforcement block have different tapers.

[0009] As a further supplement to this scheme, the taper of the upper frustum of the tapered reinforcement block near the connecting block is greater than the taper of the lower frustum of the tapered reinforcement block away from the connecting block, and the taper of the multi-level frustum of the tapered reinforcement block decreases sequentially from top to bottom.

[0010] As a further supplement to this solution, a reverse-curvature reinforcing block is fixed on the outer side of the intersection of the hook body and the hook neck of the main lifting lug and the reinforcing lifting lug. The outer curved surface of the reverse-curvature reinforcing block is set opposite to the outer curved surface of the main lifting lug or the reinforcing lifting lug at that location, and multiple reverse-curvature reinforcing blocks are interference-fitted with each other.

[0011] As a further supplement to this scheme, the cross-sections of the main lifting lug and the reinforcing lifting lug together form a non-circular symmetrical body, and the symmetrical center line of the main lifting lug and the reinforcing lifting lug is set perpendicular to the axis of the connecting shaft.

[0012] As a further supplement to this solution, the inner side of the hook neck of the main lifting lug is also integrally formed with a mounting protrusion, which is used to install the anti-derailment fastener.

[0013] In addition, this application also provides a method for hoisting steel structures during construction, using the aforementioned steel structure hoisting equipment for bridge steel structure construction.

[0014] In summary, the technical effects and advantages of this invention are as follows: 1. In this invention, by adding reinforcing lugs on both sides of the main lug, a reinforced lug structure is formed. On the one hand, this enhances the load-bearing capacity of the lug and reduces the probability of deformation and cracking of the lug structure. On the other hand, if a single lug is damaged, the other two lugs can also work together to bear the load, improving the overall reliability and safety of the lug structure. In addition, the improved lug structure reduces the stress concentration of the main lug, thereby giving the lug structure stronger load-bearing capacity and also improving the safety and reliability of the lug structure.

[0015] 2. In this invention, the strength of the hook head of the lifting lug structure can be enhanced by setting the tapered reinforcement block, thereby reducing the probability of deformation, cracking and other damage at the lower end of the lifting lug. At the same time, the multi-level frustum structure of the tapered reinforcement block can gradually disperse the end stress and avoid abrupt changes in cross-section. The stress diffusion groove can ensure the gradual diffusion of stress, forming a good transition, reducing the probability of damage to the tapered reinforcement block itself, and thus improving the overall reliability and safety.

[0016] 3. In this invention, by setting the inverted reinforcing block, the neck of the lug structure can be strengthened, and the stress in the neck of the lug structure can be evenly distributed. This reduces the probability of deformation and cracking in the neck of the lug structure, thereby further improving the reliability and safety of the lug structure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure in this embodiment; Figure 2 This is a three-dimensional structural diagram of the connecting block and the upper lifting lug assembly in this embodiment; Figure 3 This is a side view of the connecting block and the upper lug assembly in this embodiment; Figure 4 This is a cross-sectional view of the main lifting lug and the reinforcing lifting lug in this embodiment.

[0019] In the diagram: 1. Mounting plate; 2. Wheel assembly; 3. Wheel shaft; 4. Connecting block; 41. Connecting shaft; 5. Upper lifting lug assembly; 51. Main lifting lug; 511. Hook head; 52. Reinforcing lifting lug; 53. Connecting lug; 54. Reverse curve reinforcing block; 55. Tapered reinforcing block; 551. Stress diffusion groove; 56. Mounting protrusion. Detailed Implementation

[0020] 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. Example

[0021] refer to Figures 1-4 The steel structure construction lifting tool shown includes two symmetrically arranged mounting plates 1 fixedly connected by bolts, a wheel assembly 2 rotatably connected between the two mounting plates 1 via a wheel shaft 3, and a connecting block 4 rotatably connected between the two mounting plates 1 and located above the wheel assembly 2 via a connecting shaft 41. An upper lifting lug assembly 5 is installed on the connecting block 4. The upper lifting lug assembly 5 includes: The main lifting lug 51 has an integrally formed mounting protrusion 56 on the inner side of the hook neck. The mounting protrusion 56 is used to install the anti-disengagement fastener. The reinforcing lugs 52 are provided in two parts and are symmetrically distributed on both sides of the main lug 51 about the center line of the main lug 51. The two reinforcing lugs 52 are respectively abutted against the two sides of the main lug 51 on the side closest to each other. Connecting ears 53, multiple connecting ears 53 are provided and fixed to the main lifting ear 51 and two reinforcing lifting ears 52 respectively. The multiple connecting ears 53 are divided into several groups. The multiple connecting ears 53 in each group are horizontally corresponding and fixed by bolts. The multiple groups of connecting ears 53 are distributed on the outside of the main lifting ear 51 or the reinforcing lifting ear 52. The main lifting lug 51 and the reinforcing lifting lug 52 together form a non-circular symmetrical body, and the symmetrical center line of the main lifting lug 51 and the reinforcing lifting lug 52 is set perpendicular to the axis of the connecting shaft 41.

[0022] Based on the above structure, by adding reinforcing lugs 52 on both sides of the main lug 51, a reinforced lug structure is formed. On the one hand, this can enhance the load-bearing capacity of the lug and reduce the probability of deformation and cracking of the lug structure. On the other hand, if a single lug is damaged, the other two lugs can also work together to bear the load, improving the overall reliability and safety of the lug structure. In addition, the improved lug structure can reduce the stress concentration of the main lug 51, thereby giving the lug structure a stronger load-bearing capacity and also improving the safety and reliability of the lug structure.

[0023] Furthermore, the hook necks of the main lifting lug 51 and the two reinforcing lifting lugs 52 together form a cylinder. The reinforcing lifting lug 52 is located at the lower end of the connecting block 4 and has a tapered reinforcing block 55. The tapered reinforcing block 55 is fixedly sleeved on the outside of the hook head 511 of the main lifting lug 51. The tapered reinforcing block 55 is a multi-stage frustum. Specifically, stress diffusion grooves 551 are formed between the multi-stage frustums of the tapered reinforcement block 55. The cross-sectional area of ​​the stress diffusion grooves 551 is more than half of the cross-sectional area of ​​the tapered reinforcement block 55 at that location, and the multi-stage frustums of the tapered reinforcement block 55 have different tapers. In this embodiment, the taper of the upper frustum of the tapered reinforcing block 55 near the connecting block 4 is greater than the taper of the lower frustum of the tapered reinforcing block 55 away from the connecting block 4, and the taper of the multi-stage frustum of the tapered reinforcing block 55 decreases sequentially from top to bottom (as in this embodiment). Figure 3 (as shown in the image).

[0024] By setting the tapered reinforcing block 55, the hook head of the lifting lug structure can be strengthened. Figure 3 The lower part (the hook head) has increased strength, thereby reducing the probability of deformation, cracking and other damage at the lower end of the lifting lug. At the same time, the multi-stage frustum structure of the tapered reinforcement block 55 can gradually disperse the end stress and avoid abrupt changes in the cross section. The stress diffusion groove 551 can ensure the gradual diffusion of stress, forming a good transition, reducing the probability of damage to the tapered reinforcement block 55 itself, and thus improving the overall reliability and safety.

[0025] Furthermore, a curved reinforcing block 54 is fixed on the outer side of the intersection of the hook body and the hook neck of the main lifting lug 51 and the reinforcing lifting lug 52. The outer curved surface of the curved reinforcing block 54 is opposite to the outer curved surface of the main lifting lug 51 or the reinforcing lifting lug 52 at that point, and multiple curved reinforcing blocks 54 are interference-fitted to each other. By setting the inverted reinforcing block 54, the neck of the lug structure can be strengthened and the stress in the neck of the lug structure can be evenly distributed. This reduces the probability of deformation and cracking in the neck of the lug structure, thereby further improving the reliability and safety of the lug structure. Example

[0026] A steel structure construction hoisting method is provided, which uses the steel structure construction hoisting tool in Example 1 to carry out bridge steel structure construction hoisting operations. The specific hoisting operation steps and hoisting principles are the same as the existing technology, and will not be repeated here.

[0027] The working principle of this invention is as follows: During daily use, the main lifting lug 51 and the two reinforcing lifting lugs 52 on both sides form a reinforced lifting lug structure. On the one hand, this enhances the load-bearing capacity of the lifting lug and reduces the probability of deformation and cracking. On the other hand, if one lifting lug is damaged, the other two lifting lugs can still work together to bear the load, improving the overall reliability and safety of the lifting lug structure. In addition, the improved lifting lug structure reduces stress concentration in the main lifting lug 51. For example, the inverted reinforcing block 54 strengthens the neck of the lifting lug structure and makes the stress in the neck of the lifting lug structure evenly distributed. The tapered reinforcing block 55 strengthens the hook head of the lifting lug structure, thereby reducing the probability of deformation, cracking, and other damage at the lower end of the lifting lug. At the same time, the multi-stage frustum structure of the tapered reinforcing block 55 can gradually disperse the end stress and avoid abrupt changes in the cross-section. The stress diffusion groove 551 can ensure the gradual diffusion of stress, forming a good transition and reducing the probability of damage to the tapered reinforcing block 55 itself. Thus, the lifting lug structure has stronger load-bearing capacity and can also improve the safety and reliability of the lifting lug structure.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lifting device for steel structure construction, comprising two symmetrically arranged mounting plates (1) fixedly connected by bolts, a wheel assembly (2) rotatably connected between the two mounting plates (1) via a wheel axle (3), and a connecting block (4) rotatably connected between the two mounting plates (1) and located above the wheel assembly (2) via a connecting shaft (41), characterized in that, The connecting block (4) is equipped with an upper lifting lug assembly (5), the upper lifting lug assembly (5) comprising: Main lug (51); Reinforcing lugs (52), two reinforcing lugs (52) are provided and are symmetrically distributed on both sides of the main lug (51) about the center line of the main lug (51), and the two reinforcing lugs (52) are close to each other on the sides of the main lug (51) respectively. Connecting ears (53), multiple connecting ears (53) are provided and fixed to the main lifting ear (51) and two reinforcing lifting ears (52) respectively. The multiple connecting ears (53) are divided into several groups. The multiple connecting ears (53) of each group are horizontally aligned and fixed by bolts. The multiple groups of connecting ears (53) are distributed on the outside of the main lifting ear (51) or the reinforcing lifting ear (52).

2. The lifting tool for steel structure construction according to claim 1, characterized in that: The main lifting lug (51) and the two reinforcing lifting lugs (52) together form a cylinder at the hook neck. The reinforcing lifting lug (52) has a tapered reinforcing block (55) at the lower end of the connecting block (4). The tapered reinforcing block (55) is fixedly sleeved on the outside of the hook head (511) of the main lifting lug (51). The tapered reinforcing block (55) is a multi-stage frustum.

3. The lifting tool for steel structure construction according to claim 2, characterized in that: Stress diffusion grooves (551) are formed between the multi-stage frustums of the tapered reinforcement block (55). The cross-sectional area of ​​the stress diffusion grooves (551) is more than half of the cross-sectional area of ​​the tapered reinforcement block (55) at that location, and the multi-stage frustums of the tapered reinforcement block (55) have different tapers.

4. A lifting tool for steel structure construction according to claim 3, characterized in that: The taper of the upper frustum of the tapered reinforcement block (55) near the connecting block (4) is greater than the taper of the lower frustum of the tapered reinforcement block (55) away from the connecting block (4), and the taper of the multi-level frustum of the tapered reinforcement block (55) decreases sequentially from top to bottom.

5. A lifting tool for steel structure construction according to claim 1, characterized in that: The outer side of the hook body and hook neck of the main lifting lug (51) and the reinforcing lifting lug (52) are fixed with a recurved reinforcing block (54). The outer curved surface of the recurved reinforcing block (54) is opposite to the outer curved surface of the main lifting lug (51) or the reinforcing lifting lug (52) at that point. The multiple recurved reinforcing blocks (54) are interference-fitted with each other.

6. A lifting tool for steel structure construction according to any one of claims 5, characterized in that: The cross-sections of the main lifting lug (51) and the reinforcing lifting lug (52) together form a non-circular symmetrical body, and the symmetrical midline of the main lifting lug (51) and the reinforcing lifting lug (52) is set perpendicular to the axis of the connecting shaft (41).

7. A lifting tool for steel structure construction according to claim 1, characterized in that: The inner side of the hook neck of the main lifting lug (51) is also integrally formed with an installation protrusion (56), which is used to install the anti-derailment fastener.

8. A method for hoisting and erecting steel structures, characterized in that: The steel structure construction hoisting tools described in claims 1-7 are used for bridge steel structure construction hoisting operations.

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