A suspension device for working on the bottom surface of a steel box girder

Abstract

This utility model provides a suspension device for working on the bottom surface of steel box girders, relating to the technical field of steel box girder bottom surface operations. The suspension device includes a wire rope, a suspended platform, and a traction rope. The suspended platform includes a platform body, with one end of the traction rope fixed to the platform body and the other end free for another worker or an external power device to apply traction. The platform also includes a lifting device located below a support plate to drive the support plate to reciprocate vertically. This utility model, by adding a lifting device below the support plate, solves the problem of existing suspended platforms having a fixed height and being unable to flexibly adapt to operational needs.

Description

Technical Field

[0001] This utility model belongs to the technical field of steel box girder bottom surface operation, and in particular relates to a suspension device for steel box girder bottom surface operation. Background Technology

[0002] In bridge construction, steel box girders are widely used in the main structure of long-span bridges due to their advantages such as high load-bearing capacity and good structural stability. Steel box girders are typically constructed using a factory prefabrication and on-site segmented hoisting and splicing method. During the splicing process, welding operations are required at the joints of the bottom plates of each segment. In some cases, subsequent work such as weld flaw detection and anti-corrosion coating application is also necessary. To achieve these operations on the bottom surface of the steel box girder, the industry commonly uses suspended baskets as work platforms. After workers enter the basket, a traction device moves the basket along the bottom surface of the steel box girder to complete the corresponding work tasks.

[0003] However, the load-bearing surface height of existing suspended platforms is fixed and cannot be flexibly adjusted according to operational needs. Since different work processes (such as welding and coating) have different requirements for the distance between the workers and the work surface, a fixed-height suspended platform will cause workers to frequently adjust their body posture to adapt to the work position, resulting in physical discomfort. Utility Model Content

[0004] In view of this, the present invention provides a suspension device for working on the bottom surface of steel box girders, which aims to solve the problem that the bearing surface height of existing suspended baskets is fixed and cannot be flexibly adjusted.

[0005] The technical solution of this utility model is implemented as follows: This utility model embodiment provides a suspension device for working on the bottom surface of a steel box girder, including a steel wire rope with both ends detachably fixed to pre-set fixing points on the bottom surface of the steel box girder; a suspended platform including a platform body, the platform body including a bearing plate and multiple columns connected to the periphery of the bearing plate, the top of the columns being slidably connected to the steel wire rope; the bearing plate and the multiple columns enclose a space for accommodating workers; the bearing plate is used to support one worker; a traction rope, one end fixed to the platform body, the other end being a free end for another worker or an external power device to apply traction force; wherein, the suspended platform also includes a lifting device, the lifting device being disposed below the bearing plate to drive the bearing plate to reciprocate in the vertical direction.

[0006] In one embodiment, the lifting device includes a hydraulic cylinder and a piston rod. The cylinder body of the hydraulic cylinder is fixed to the bottom of the basket body. One end of the piston rod is connected to the piston of the hydraulic cylinder, and the other end is connected to the bearing plate. By the inflow and outflow of hydraulic oil in the hydraulic cylinder, the piston is pushed to move, thereby driving the piston rod to extend and retract, so as to realize the reciprocating movement of the bearing plate in the vertical direction.

[0007] In this embodiment, a buffer spring is provided between the piston rod and the support plate.

[0008] In one embodiment, a pulley is fixedly provided at the top of the column, and the pulley is slidably connected to the wire rope; the suspension device further includes a locking member, which includes a connecting part and two locking parts disposed at both ends of the connecting part, and the two locking parts are respectively locked to the wire ropes on both sides of the pulley to prevent and allow the pulley to slide relative to the wire rope.

[0009] In one embodiment, the locking part includes a locking clip that is elastic and capable of tightly gripping the wire rope when locked.

[0010] In one embodiment, the inner side of the locking clip is provided with anti-slip texture or serrations to increase the friction between it and the wire rope.

[0011] In one embodiment, the support plate includes: a main support plate with through holes around its perimeter, through which the plurality of columns are respectively inserted; the main support plate is used to support workers; an auxiliary support plate is slidably connected to the edge of the main support plate; wherein the lifting device is connected to the main support plate.

[0012] In one embodiment, both the main support plate and the auxiliary support plate are rectangular, and the opposite two edges of the auxiliary support plate are folded upward to form a groove, and the opposite two edges of the main support plate are slidably connected within the groove.

[0013] In one embodiment, the auxiliary support plate is provided with a clearance hole that extends along the extension direction of the slide groove.

[0014] In one embodiment, two auxiliary support plates are provided, and the two auxiliary support plates are respectively provided at opposite ends of the main support plate.

[0015] This invention solves the problem of existing suspended scaffolds having a fixed height and being unable to flexibly adapt to operational needs by adding a lifting device below the support plate. During operation, when workers face the uneven weld seams on the bottom surface of the steel box girder, or when switching between different work processes such as welding and anti-corrosion coating application, they can quickly adjust to a suitable working height by controlling the lifting device to move the support plate vertically. This design not only eliminates the need for workers to frequently adjust their body posture, effectively reducing the labor intensity of high-altitude operations, but also ensures the stability of work movements, thereby improving the welding quality of the weld seams and the uniformity of the coating application, significantly improving overall work efficiency. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the suspension device provided by this utility model (auxiliary support plate in storage state). Figure 2 A schematic diagram of the suspension device provided by this utility model (with the auxiliary support plate in the unfolded state). Figure 3 This is a structural schematic diagram of the suspended platform body provided by this utility model; Figure 4 A schematic diagram of the structure of the support plate provided by this utility model.

[0018] Explanation of reference numerals in the attached figures: 100. Suspension device; 1. Wire rope; 2. Suspended basket; 21. Suspended basket body; 211. Bearing plate; 2111. Main bearing plate; 21111. Through hole; 2112. Auxiliary bearing plate; 21121. Slide groove; 21122. Clearance hole; 212. Column; 213. Crossbar; 214. Accommodation space; 22. Lifting device; 221. Hydraulic cylinder; 222. Piston rod; 23. Pulley; 3. Traction rope; 4. Locking component; 41. Connecting part; 42. Locking part; 421. Locking clamp; 200. Steel box girder. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] In bridge construction, steel box girders are widely used in the main structure of long-span bridges due to their advantages such as high load-bearing capacity and good structural stability. Steel box girders are typically constructed using a factory prefabrication and on-site segmented hoisting and splicing method. During the splicing process, welding operations are required at the joints of the bottom plates of each segment. In some cases, subsequent work such as weld flaw detection and anti-corrosion coating application is also necessary. To achieve these operations on the bottom surface of the steel box girder, the industry commonly uses suspended baskets as work platforms. After workers enter the basket, a traction device moves the basket along the bottom surface of the steel box girder to complete the corresponding work tasks.

[0023] However, the load-bearing surface height of existing suspended platforms is fixed and cannot be flexibly adjusted according to operational needs. Since different work processes (such as welding and coating) have different requirements for the distance between the workers and the work surface, a fixed-height suspended platform will cause workers to frequently adjust their body posture to adapt to the work position, resulting in physical discomfort.

[0024] In view of this, the present invention provides a suspension device for working on the bottom surface of a steel box girder, which aims to solve the problem that the bearing surface height of the existing suspended basket is fixed and cannot be flexibly adjusted.

[0025] Please see Figure 1 and Figure 2 The suspension device 100 includes a wire rope 1, a suspended platform 2, and a traction rope 3. The wire rope 1, as the main load-bearing component of the entire suspension device 100, has both ends securely and detachably fixed to pre-set fixing points on the bottom surface of the steel box girder 200. This design ensures installation stability and facilitates quick disassembly and reinstallation in different working conditions. It is made of high-strength, wear-resistant special steel, capable of bearing the weight of the suspended platform 2 and the workers, while resisting environmental corrosion to ensure long-term safety.

[0026] The suspended platform 2 serves as the primary workspace for the workers. The suspended platform 2 comprises a platform body 21, a support plate 211 of the platform body 21, and multiple uprights 212 forming a accommodating space 214, providing a working environment for the workers. The support plate 211 can withstand the weight of the workers and tools. The sliding connection between the pulleys 23 at the top of the uprights 212 and the wire rope 1 allows for smoother movement of the suspended platform 2 on the wire rope 1.

[0027] The traction rope 3 is a key component for moving the suspended platform 2. One end is fixed to the platform body 21, while the other end is a free end that can be manually pulled by another worker or connected to an external power device, such as an electric winch, to provide stable and controllable traction. By pulling the traction rope 3, the suspended platform 2 can move flexibly along the wire rope 1 on the bottom surface of the steel box girder 200 to reach different working positions.

[0028] The suspended platform 2 also includes a lifting device 22, which is located below the support plate 211 to drive the support plate 211 to move back and forth in the vertical direction, thereby meeting the different requirements of different work processes for the distance between the workers and the work surface.

[0029] In actual operation, when workers are welding, they can operate the lifting device 22 to raise the support plate 211 to a suitable height, allowing them to perform welding operations in a more comfortable posture and avoiding fatigue and discomfort caused by frequent adjustments to body posture due to unsuitable height. Furthermore, when performing weld flaw detection or applying anti-corrosion coatings, the support plate 211 can be adjusted to the appropriate height according to specific needs, improving work efficiency and quality.

[0030] In summary, the suspension device 100 for working on the bottom surface of a steel box girder 200 provided by this utility model includes a wire rope 1, a suspended basket 2, and a traction rope 3. Both ends of the wire rope 1 are detachably fixed to preset fixing points on the bottom surface of the steel box girder 200. The suspended basket 2 includes a basket body 21, which includes a bearing plate 211 and multiple columns 212 connected to the periphery of the bearing plate 211. The top of the columns 212 is slidably connected to the wire rope 1. The bearing plate 211 and the multiple columns 212 enclose a space 214 for accommodating workers. The bearing plate 211 is used to carry a worker. One end of the traction rope 3 is fixed to the basket body 21, and the other end is a free end for another worker or an external power device to apply traction force. The suspended basket 2 also includes a lifting device 22, which is located below the bearing plate 211 to drive the bearing plate 211 to move back and forth in the vertical direction. This embodiment of the invention solves the problem of existing suspended baskets having a fixed height and being unable to flexibly adapt to operational needs by adding a lifting device 22 below the support plate 211. During operation, when workers face the uneven weld seams on the bottom surface of the steel box girder 200, or when switching between different work processes such as welding and anti-corrosion coating application, they can quickly adjust to a suitable working height by controlling the lifting device 22 to drive the support plate 211 to move vertically. This design not only eliminates the need for workers to frequently adjust their body posture, effectively reducing the labor intensity of high-altitude operations, but also ensures the stability of work movements, thereby improving the welding quality of the weld seams and the uniformity of the coating application, and significantly improving overall work efficiency.

[0031] In some embodiments, please continue reading Figure 1 and Figure 2 The lifting device 22 employs a hydraulic cylinder 221 and a piston rod 222. The cylinder body of the hydraulic cylinder 221 is firmly fixed to the bottom of the basket body 21. One end of the piston rod 222 is tightly connected to the piston of the hydraulic cylinder 221, and the other end is securely connected to the support plate 211. When the height of the support plate 211 needs to be adjusted, the piston is pushed to move linearly by controlling the inflow and outflow of hydraulic oil in the hydraulic cylinder 221, thereby driving the piston rod 222 to extend and retract. This transmission method enables the support plate 211 to reciprocate in the vertical direction, meeting the precise height adjustment requirements under different operating scenarios.

[0032] To improve the performance and safety of the suspension device 100, a buffer spring is installed between the piston rod 222 and the support plate 211. The buffer spring can buffer the impact force generated during lifting and lowering, preventing the support plate 211 from shaking violently due to sudden external forces, and providing a more stable working environment for operators.

[0033] In some embodiments, please continue reading Figure 1 and Figure 2To reduce the random swaying of the suspended platform 2, a locking component 4 is added. Specifically, the locking component 4 includes a connecting part 41 and two locking parts 42 disposed at both ends of the connecting part 41. The two locking parts 42 are respectively locked to the steel wire ropes 1 on both sides of the pulley 23 to prevent and allow the pulley 23 to slide relative to the steel wires.

[0034] When workers need to work at a certain location, they can operate the locking device 4 to tightly engage the two locking parts 42 around the wire rope 1 on both sides of the pulley 23, thereby preventing the pulley 23 from sliding relative to the wire rope 1. This prevents the suspended platform 2 from swaying due to external factors (such as wind or worker movements), providing a stable working platform for the workers. When it is necessary to move the suspended platform 2 to other working positions, simply release the locking device 4 from the wire rope 1, and the pulley 23 can slide smoothly on the wire rope 1, enabling the suspended platform 2 to move flexibly.

[0035] In some embodiments, please continue reading Figure 1 and Figure 2 The locking part 42 includes a locking clip 421, which is elastic and can tightly hold the wire rope 1 when locked.

[0036] The locking clip 421 can specifically be a dovetail clip, which has a simple structure, is easy to operate, has a low cost, and can provide sufficient clamping force. The locking clip 421 can be made of high-strength spring steel, which has good elasticity and toughness and can maintain good clamping performance even after repeated use.

[0037] Furthermore, to facilitate the operation of the locking clamp 421 by the operator, an operating handle is provided on the outside of the locking clamp 421. The operator can easily open and close the locking clamp 421 by operating the handle, thereby improving the convenience and efficiency of operation.

[0038] In some embodiments, please continue reading Figure 1 and Figure 2 The inner side of the locking clip 421 is provided with anti-slip texture or serrations to increase the friction between it and the wire rope 1.

[0039] This anti-slip texture or serrated design makes the locking clamp 421 more secure when gripping the wire rope 1, effectively preventing the locking clamp 421 from slipping on the wire rope 1, and further enhancing the locking effect of the locking component 4. In harsh working environments, such as strong winds or when workers make large movements inside the suspended platform 2, the anti-slip texture or serrated design ensures that the locking clamp 421 is firmly fixed to the wire rope 1, guaranteeing the stability of the suspended platform 2 and the safety of the workers.

[0040] In some embodiments, please refer to Figure 3 and Figure 4To facilitate the placement of tools by operators, the support plate 211 is designed to be expandable. Specifically, the main support plate 2111 has through holes 21111 around its perimeter, through which multiple columns 212 are inserted. The main support plate 2111 is used to support operators. The auxiliary support plate 2112 is slidably connected to the edge of the main support plate 2111. The lifting device 22 is connected to the main support plate 2111.

[0041] Since multiple columns 212 are inserted through the main support plate 2111, the edge of the main support plate 2111 is located outside the area enclosed by the multiple columns 212, so there will be no interference between the auxiliary support plate 2112 and the multiple columns 212.

[0042] In practical use, when operators need more space to place tools or materials, the auxiliary support plate 2112 can be easily slid out from the edge of the main support plate 2111 to expand the load-bearing area and meet operational needs (such as...). Figure 2 As shown, the auxiliary support plate 2112 is in an extended state. When it is not necessary to increase the load-bearing area, the auxiliary support plate 2112 can be retracted to the edge of the main support plate 2111, without occupying extra space, ensuring the overall compactness of the suspended platform 2 (e.g., Figure 1 As shown, the auxiliary support plate 2112 is in a retracted state.

[0043] In some embodiments, please continue reading Figure 3 and Figure 4 In order to achieve a sliding connection between the auxiliary support plate 2112 and the main support plate 2111, the main support plate 2111 and the auxiliary support plate 2112 are both rectangular. The two opposite edges of the auxiliary support plate 2112 are folded upward to form a groove 21121, and the two opposite edges of the main support plate 2111 are slidably connected in the groove 21121.

[0044] This sliding connection between the groove 21121 and the edge is simple and stable, effectively ensuring that the auxiliary support plate 2112 slides smoothly in and out of the edge of the main support plate 2111. Meanwhile, to prevent the auxiliary support plate 2112 from accidentally detaching from the main support plate 2111 during sliding, a limiting strip can be provided at the end of the groove 21121. The limiting strip can be made of rubber or plastic, serving both a limiting function and a buffering function when the auxiliary support plate 2112 slides to its end, reducing noise and damage caused by collisions.

[0045] In some embodiments, please continue reading Figure 3 and Figure 4 In order to take into account that the main support plate 2111 is connected to the lifting device 22, and to avoid interference between the auxiliary support plate 2112 and the lifting device 22, the auxiliary support plate 2112 is provided with a clearance hole 21122.

[0046] The shape and size of the clearance hole 21122 are designed according to the shape and size of the lifting device 22 to ensure that the lifting device 22 will not collide with the auxiliary support plate 2112 during its up-and-down movement. When the main support plate 2111 moves up and down under the drive of the lifting device 22, the auxiliary support plate 2112 can avoid the lifting device 22 through the clearance hole 21122, ensuring the normal operation of the entire suspension device 100.

[0047] In some embodiments, please continue reading Figure 3 and Figure 4 Two auxiliary support plates 2112 are provided, and the two auxiliary support plates 2112 are respectively provided at opposite ends of the main support plate 2111.

[0048] This design makes the expansion of the support plate 211 more balanced and effective. The auxiliary support plates 2112 at both ends can slide out simultaneously, greatly increasing the load-bearing area and providing more space for workers to place tools, materials and other items. Moreover, the double-sided auxiliary support plates 2112 are also more symmetrical in structure, which helps to maintain the overall stability of the suspended platform 2.

[0049] During operation, the operator can flexibly control the sliding length of the auxiliary support plates 2112 on both sides according to actual needs. When one side needs to place more and heavier items, the auxiliary support plate 2112 on that side can be slid out a longer distance; if the item placement needs on both sides are relatively balanced, the auxiliary support plates 2112 on both sides can be slid out to the same length.

[0050] In addition, to further enhance the practicality and safety of the suspension device 100, a guardrail can be installed on the suspended platform body 21. The guardrail surrounds the bearing plate 211 at a moderate height, which can prevent workers from accidentally falling during operation without causing excessive obstruction to their work.

[0051] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A suspension device for working on the bottom surface of a steel box girder, characterized in that, include: The steel wire rope, with both ends used for detachable fixing to pre-set fixing points on the bottom surface of the steel box girder; A suspended platform includes a platform body, the platform body including a support plate and multiple columns connected to the periphery of the support plate, the top of the columns being slidably connected to the wire rope; the support plate and the multiple columns enclose a space for accommodating workers; the support plate is used to support one worker. The towing rope has one end fixed to the basket body and the other end is a free end for another worker or external power device to apply traction force. The suspended platform also includes a lifting device, which is located below the support plate to drive the support plate to move back and forth in the vertical direction.

2. The suspension device for working on the bottom surface of a steel box girder according to claim 1, characterized in that, The lifting device includes a hydraulic cylinder and a piston rod. The cylinder body of the hydraulic cylinder is fixed to the bottom of the basket body. One end of the piston rod is connected to the piston of the hydraulic cylinder, and the other end is connected to the bearing plate. By the inflow and outflow of hydraulic oil in the hydraulic cylinder, the piston is pushed to move, thereby driving the piston rod to extend and retract, realizing the reciprocating movement of the bearing plate in the vertical direction.

3. The suspension device for working on the bottom surface of a steel box girder according to claim 2, characterized in that, A buffer spring is provided between the piston rod and the support plate.

4. The suspension device for working on the bottom surface of a steel box girder according to claim 1, characterized in that, A pulley is fixed to the top of the column, and the pulley is slidably connected to the wire rope; The suspension device further includes a locking member, which includes a connecting part and two locking parts disposed at both ends of the connecting part. The two locking parts are respectively locked to the steel wire ropes on both sides of the pulley to prevent and allow the pulley to slide relative to the steel wires.

5. The suspension device for working on the bottom surface of a steel box girder according to claim 4, characterized in that, The locking part includes a locking clip, which is elastic and can tightly hold the wire rope when locked.

6. The suspension device for working on the bottom surface of a steel box girder according to claim 5, characterized in that, The inner side of the locking clip is provided with anti-slip texture or serrations to increase the friction between it and the wire rope.

7. The suspension device for working on the bottom surface of a steel box girder according to claim 1, characterized in that, The support plate includes: The main support plate has through holes around its perimeter, and the multiple columns are inserted through the through holes one by one; the main support plate is used to support the workers. An auxiliary support plate is slidably connected to the edge of the main support plate; The lifting device is connected to the main support plate.

8. The suspension device for working on the bottom surface of a steel box girder according to claim 7, characterized in that, Both the main support plate and the auxiliary support plate are rectangular. The opposite two edges of the auxiliary support plate are folded upward to form a sliding groove, and the opposite two edges of the main support plate are slidably connected within the sliding groove.

9. The suspension device for working on the bottom surface of a steel box girder according to claim 8, characterized in that, The auxiliary support plate is provided with clearance holes, which extend along the extension direction of the slide groove.

10. The suspension device for working on the bottom surface of a steel box girder according to claim 8, characterized in that, Two auxiliary support plates are provided, and the two auxiliary support plates are respectively located at opposite ends of the main support plate.

Images