Wind-resistant device for hoisting and mounting highway-railway dual-purpose steel truss girder

Abstract

The utility model discloses a wind-resistant device for hoisting and installing a highway-railway dual-purpose steel truss girder, which comprises a sling, a hook claw connected to the bottom end of the sling, a threaded groove formed in the hook claw, two protruding blocks mounted on the inner wall of the hook claw, a clamping part formed between the two protruding blocks, and a screw rod in threaded fit in the threaded groove, a bottom ring is rotationally arranged at the bottom end of the screw, and a limiting block is installed at the bottom of the bottom ring. When a steel rope connected with the steel truss penetrates through the hook claws and is installed, the screw rod is screwed, so that the bottom ring drives the limiting block to press and reinforce the connection position of the steel rope and the hook claws, the steel rope is effectively prevented from swinging or loosening due to wind power, the overall stability of the steel truss is improved, and the safety in the installation process is guaranteed; loosening or falling-off of the connecting position caused by the wind action is avoided, and the safety of the hoisting process is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel truss girder lifting devices, in particular to a wind-resistant device for lifting and installing a road-rail dual-purpose steel truss girder. Background Art

[0002] With the rapid development of modern transportation construction, the safety and stability of dual-use road-rail bridges as important transportation hubs are particularly important during their construction. In the construction of dual-use road-rail bridges, steel trusses are key load-bearing components, and their hoisting and installation work is directly related to the quality and safety of the entire bridge. During the hoisting and installation of steel trusses, lifting equipment such as slings and hooks are indispensable tools. Although traditional lifting equipment can meet basic lifting needs, when facing complex and changeable natural environments, especially in windy weather, the connection between the steel cable and the hook is prone to loosening, thus affecting the hoisting stability and safety of the steel trusses;

[0003] The wind-resistant devices in the prior art mostly adopt methods such as increasing the deadweight of the equipment and improving the strength of the materials, but these methods often result in bulky equipment, high cost, and poor adaptability to the environment. Under the action of wind, the connection position between the steel cable connecting the steel truss and the hook of the lifting and installation device is prone to shaking, resulting in a decrease in the lifting stability and an increase in the construction risk. It is impossible to effectively prevent the steel cable from sliding or loosening under the action of wind, affecting the safety and reliability of the lifting. Therefore, a wind-resistant device for lifting and installing dual-purpose steel trusses for road and rail is proposed to overcome the above-mentioned defects. Utility Model Content

[0004] The utility model aims to solve the disadvantage of poor wind resistance of the lifting device in the prior art, and proposes a wind resistance device for lifting and installing a road-rail dual-purpose steel truss.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A wind-resistant device for lifting and installing a dual-purpose steel truss for road and rail includes a sling, the bottom end of which is connected to a hook claw, a threaded groove is provided in the hook claw, two protrusion blocks are installed on the inner wall of the hook claw, and a clamping portion is formed between the two protrusion blocks.

[0007] The utility model also comprises a screw rod, the screw rod thread is matched in the thread groove, a bottom ring is rotated at the bottom end of the screw rod, and a limiting block is installed at the bottom of the bottom ring.

[0008] Preferably, a rubber pad is installed at the bottom of the limiting block.

[0009] Preferably, a limiting member is installed on the top of the bottom ring.

[0010] Preferably, the limiting member comprises a slider and a limiting ring, and one side of the limiting ring is connected to two sliders.

[0011] Preferably, a limiting groove and two sliding grooves are provided inside the hook claw, and the two sliding grooves are both connected to the limiting groove and are located on one side of the limiting groove.

[0012] Preferably, the limiting ring is slidably fitted in the limiting groove, and the two sliding blocks are slidably fitted in the sliding groove.

[0013] The utility model has the following beneficial effects:

[0014] 1. Under the cooperation of the limit block and the screw, when the steel cable connecting the steel truss is passed through the hook and installed, the screw is turned so that the bottom ring drives the limit block to press and reinforce the connection between the steel cable and the hook, effectively avoiding the swaying or loosening of the steel cable due to wind force, thereby increasing the overall stability of the steel truss, ensuring the safety of the installation process, avoiding the loosening or falling off of the connection due to wind force, and further improving the safety of the lifting process;

[0015] 2. With the cooperation of the protrusion block and the clamping part, when the steel cable is hung on the hook, the steel cable is located in the clamping part and contacts with the two protrusion blocks. The steel cable is initially limited by the clamping force between the two protrusion blocks, which further increases the fixing performance of the steel cable in the hook, making it difficult for it to slide or twist in the hook due to wind force, thereby further increasing the wind resistance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the sling and the hook;

[0017] Figure 2 It is a schematic diagram of the structure of the hook and the protrusion block;

[0018] Figure 3 It is a schematic diagram of the structure of the hook and the screw;

[0019] Figure 4 It is a schematic diagram of the structure of the hook and the screw.

[0020] In the figure: 1, sling; 2, hook; 201, threaded groove; 202, limit groove; 203, slide groove; 3, screw; 4, bottom ring; 5, limit block; 501, rubber pad; 6, limit piece; 601, slider; 602, limit ring; 7, protrusion block. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-4A wind-resistant device for lifting and installing a dual-purpose steel truss for road and rail, comprising a sling 1, a hook 2 connected to the bottom end of the sling 1, a limit groove 202 and two slide grooves 203 are provided inside the hook 2, the two slide grooves 203 are both connected to the limit groove 202 and are located on one side of the limit groove 202, a threaded groove 201 is provided in the hook 2, two protrusion blocks 7 are installed on the inner wall of the hook 2, a clamping portion is formed between the two protrusion blocks 7, when the steel cable is hung on the hook 2, the steel cable is located in the clamping portion and contacts with the two protrusion blocks 7, the steel cable is initially limited by the clamping force between the two protrusion blocks 7, and the fixing performance of the steel cable in the hook 2 is further increased.

[0023] The screw rod 3 is also included. The screw rod 3 is threadedly engaged in the thread groove 201. The bottom end of the screw rod 3 is rotated with a bottom ring 4. A limit piece 6 is installed on the top of the bottom ring 4. The limit piece 6 can limit the movement of the bottom ring 4. The limit piece 6 has a slider 601 and a limit ring 602. Two sliders 601 are connected to one side of the limit ring 602. The limit ring 602 is slidably engaged in the limit groove 202. When the screw rod 3 rotates, the limit ring 602 can limit the movement distance of the limit block 5. The two sliders 601 are slidably engaged in the slide groove 203. When the screw rod 3 rotates, the slider 601 slides in the slide groove 203, so that the bottom ring 4 can be moved. The ring 4 will move along the slide groove 203 but will not rotate with the screw rod 3. A limit block 5 is installed at the bottom of the bottom ring 4. A rubber pad 501 is installed at the bottom of the limit block 5. When the steel cable is compressed, the rubber pad 501 can prevent damage to the steel cable and increase its service life. When the steel cable connecting the steel truss is passed through the hook 2 and installed, the screw rod 3 is turned to allow the screw rod 3 to move inward along the thread groove 201 through the thread groove 201. Since the slider 601 slides in the slide groove 203 to limit the movement of the bottom ring 4, the bottom ring 4 drives the limit block 5 to compress and reinforce the connection position between the steel cable and the hook 2.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wind-resistant device for lifting and installing a dual-purpose steel truss beam for road and rail, characterized in that: include: A sling (1), wherein the bottom end of the sling (1) is connected to a hook (2), a thread groove (201) is provided in the hook (2), two protruding blocks (7) are installed on the inner wall of the hook (2), and a clamping portion is formed between the two protruding blocks (7); It also comprises a screw rod (3), wherein the screw rod (3) is threadedly engaged in the thread groove (201), a bottom ring (4) is rotatably arranged at the bottom end of the screw rod (3), and a limit block (5) is installed at the bottom of the bottom ring (4).

2. The wind-resistant device for lifting and installing a dual-purpose steel truss beam for road and rail according to claim 1 is characterized in that: A rubber pad (501) is installed at the bottom of the limiting block (5).

3. The wind-resistant device for lifting and installing a dual-purpose steel truss beam for road and rail according to claim 1 is characterized in that: A limiting member (6) is installed on the top of the bottom ring (4).

4. The wind-resistant device for lifting and installing a dual-purpose steel truss beam for road and rail as claimed in claim 3 is characterized by: The limiting member (6) comprises a slider (601) and a limiting ring (602), and one side of the limiting ring (602) is connected to two sliders (601).

5. The wind-resistant device for lifting and installing a dual-purpose steel truss beam for road and rail as claimed in claim 1 is characterized in that: A limiting groove (202) and two sliding grooves (203) are provided inside the hook claw (2), and the two sliding grooves (203) are both connected to the limiting groove (202) and are located on one side of the limiting groove (202).

6. The wind-resistant device for lifting and installing a dual-purpose steel truss beam for road and rail as claimed in claim 4 is characterized by: The limiting ring (602) is slidably fitted in the limiting groove (202), and the two sliding blocks (601) are slidably fitted in the sliding groove (203).

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