A bridge deck hoisting device for a steel truss bridge

Abstract

The present application relates to a kind of bridge deck hoisting device for steel truss bridge, the top of main truss is provided with operating support platform, operating support platform is provided with wire arrangement mechanism, anti-swing pressure wheel side wall in wire arrangement mechanism is opened with the recess corresponding to lifting steel cable one-one, can form independent radial limit constraint to the lifting steel cable of multiple parallel arrangement.Wire arrangement mechanism is provided with winding cleaning mechanism below, the transmission relationship between center column and support shaft is realized by the linkage mechanism of winding cleaning mechanism, the mechanical energy of anti-swing pressure wheel rotation driven when lifting steel cable is reeled in and out, directly drive the synchronous rolling operation of the outer sleeve of winding cleaning mechanism, the design does not need to additionally configure motor and other power elements, and cleaning rhythm is synchronous with lifting steel cable operating state.The present application integrates wire arrangement mechanism and winding cleaning mechanism into integrated function module, overall mounting is in operating support platform bottom, without needing to transform the main structure of original hoisting equipment.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction equipment technology, specifically relating to a bridge deck hoisting device for steel truss bridges. Background Technology

[0002] During the construction of steel truss bridges, bridge cranes are often used in conjunction with multiple parallel steel cables to lift, move, and align steel truss segments. As the core load-bearing component of the hoisting system, the stability of the steel cables directly affects the construction safety and service life of the equipment during high-altitude hoisting. The construction environment at bridge high-altitude hoisting sites is complex, generating a large amount of hard impurities such as welding slag and rust. These accumulate on the contact surface of the pressure rollers and in the gaps between the cables as they are continuously wound up. Over time, these impurities harden and clump, causing structural damage such as scratches and broken wires, significantly reducing the load-bearing stability and service life of the cables. Furthermore, these impurities can become trapped between the cables and pressure rollers, accelerating roller wear, causing jamming and deformation, and affecting the normal operation of the hoisting equipment.

[0003] Regarding the issues related to steel cable cleaning, some solutions already exist in the existing technology. For example, patent CN220502497U discloses a single-girder bridge crane that uses a motor-driven rotating cleaning brush to sweep dust off the surface of the suspended steel cable. However, this solution requires a separate drive motor to power the cleaning brush and cannot solve the problems of steel cable misalignment and friction, and wear of guide components. Another example is patent application CN118026002A, which discloses an auxiliary hoisting device for bridge installation construction. This device includes a cleaning unit comprising a cleaning component, a collection component, and a coating component, and can complete cleaning and rust-preventive coating operations while the wire rope is being wound up. However, this solution lacks a linkage between the cleaning action and the steel cable guide components, resulting in a complex overall structure that cannot simultaneously complete the guiding and limiting operations and impurity cleaning during the steel cable winding and unwinding process.

[0004] In summary, existing steel truss bridge deck hoisting equipment cannot simultaneously perform the functions of cable management and anti-swaying, positioning and guidance, and simultaneous debris removal for multiple lifting cables, thus failing to fully meet the construction safety and long service life requirements for high-altitude hoisting of large-span steel trusses. Therefore, there is an urgent need to develop a bridge deck hoisting device that can simultaneously manage and limit the movement of multiple lifting cables and complete debris removal synchronously with the cable retraction and deployment. Summary of the Invention

[0005] The purpose of this invention is to provide a bridge deck hoisting device for steel truss bridges that is simple in structure and reasonably designed in order to solve the above-mentioned problems.

[0006] The present invention achieves the above objectives through the following technical solutions: A bridge deck hoisting device for a steel truss bridge includes a main truss. An operating support platform is mounted on the top of the main truss. A suspension control mechanism is mounted on the operating support platform, and a lifting cable is wound around the suspension control mechanism. A cable management mechanism is also mounted on the operating support platform. The cable management mechanism includes an upper support fixed to the bottom of the operating support platform, a central column rotatably connected to the upper support, and an anti-sway pressure wheel fixedly fitted on the central column, pressing against the lifting cable. The side wall of the anti-sway pressure wheel has grooves corresponding to the lifting cable. A connecting side plate is mounted at the bottom of the upper support, and a winding and cleaning mechanism is mounted on the connecting side plate. The winding and cleaning mechanism includes a lower support, a support shaft, an outer sleeve, and a linkage mechanism. The lower support is fixed to the bottom of the side wall of the connecting side plate, and a support shaft is rotatably connected to the lower support. An outer sleeve is fixedly fitted on the support shaft, and a wire brush for rolling and brushing the lifting cable is mounted on the outer sleeve. The support shaft is drivenly connected to the central column through the linkage mechanism.

[0007] In one embodiment, the linkage mechanism includes a lower roller, an upper roller, and a drive belt. The lower roller is fixedly sleeved on one end of the support shaft, and the upper roller is fixedly sleeved on one end of the central column. The drive belt is tensioned on the lower roller and the upper roller.

[0008] In one embodiment, the linkage mechanism further includes a connecting shaft and a central roller. The connecting shaft is rotatably connected to the connecting side plate, and a central roller is fixedly sleeved on one end of the connecting shaft. The drive belt is wound around the central roller, and the central roller is used to tension the drive belt.

[0009] In one embodiment, there are at least two support shafts, each of which is fitted with an outer sleeve. The at least two support shafts are located on opposite sides of the lifting cable. Two spaced-apart connecting side plates are fixed to the bottom of the upper support. The lifting cable is located between the two connecting side plates. The support shaft is rotatably disposed between the two connecting side plates. There are two linkage mechanisms, which are respectively installed on the two connecting side plates and are used to drive the support shafts located on opposite sides of the lifting cable to rotate.

[0010] In one embodiment, a high-pressure purging mechanism that works in conjunction with the linkage mechanism is mounted on the connecting side plate. The high-pressure purging mechanism is located on one side of the outer sleeve and is used to purge the surface of the lifting cable.

[0011] In one embodiment, the high-pressure purging mechanism includes a rotating disk, a support plate, a swing assembly, and an air nozzle. The rotating disk is fixedly sleeved on the connecting shaft and can rotate synchronously with the connecting shaft. The support plate is fixedly installed on the connecting side plate, the swing assembly is set on the support plate, and the air nozzle is installed on the swing assembly. The rotation of the rotating disk drives the air nozzle to swing relative to the lifting steel cable through the swing assembly.

[0012] In one embodiment, the swing assembly includes a guide rod, a rack, and a support gear. The guide rod is slidably mounted on a support plate. One end of the guide rod is fixedly connected to a rack that slides with the support plate. The end of the guide rod away from the rack is connected to a rotating disk. The rotation of the rotating disk can periodically push the guide rod to complete the reciprocating sliding motion. The top of the support plate is rotatably equipped with a support gear that meshes with the rack. An air nozzle is mounted on the top of the support gear.

[0013] In one embodiment, the swing assembly further includes a support spring. The end of the rack is connected to a support plate via the support spring. The support spring provides elastic force to the rack in the direction of the guide rod. The end of the guide rod away from the rack abuts against the surface of the rotating disk under the action of the support spring. At least two protrusions are spaced apart around the axis of the rotating disk. The rotating disk rotates so that the guide rod can abut against the protrusions to periodically push the guide rod to complete the reciprocating sliding motion.

[0014] In one embodiment, the air nozzle is connected to a high-pressure air pipe via a flexible hose. The high-pressure air pipe is fixed to the connecting side plate and is used to connect to an external air source device. A control valve for regulating the on / off state of the air passage is installed on the body of the high-pressure air pipe.

[0015] In one embodiment, a bridge deck hoisting device for a steel truss bridge includes at least two main trusses arranged at relative intervals, with a cross bracing beam between the main trusses, an anchoring and traveling mechanism at the bottom of the main trusses, an electrical control box on the anchoring and traveling mechanism, and a traveling component installed at the bottom of the anchoring and traveling mechanism.

[0016] The beneficial effects of this invention are as follows: This invention addresses the operational requirements of steel truss bridge deck hoisting by integrating cable management and guidance functions with cable cleaning functions. Through a purely mechanical linkage structure, it achieves the limiting and anti-swaying of multiple lifting cables and simultaneous cleaning.

[0017] The anti-sway pressure roller in the cable management mechanism has grooves on its sidewalls that correspond one-to-one with the lifting cables, providing independent radial restraint for multiple parallel lifting cables. During repeated winding and unwinding and hoisting operations, the groove structure effectively limits the lateral movement and misalignment of the lifting cables, preventing frictional interference between adjacent cables, ensuring uniform stress on each cable, and mitigating localized wear and deformation. A linkage mechanism establishes a transmission relationship between the central column and the support shaft, utilizing the mechanical energy generated by the lifting cables during winding and unwinding to directly drive the outer sleeve of the winding and cleaning mechanism to rotate synchronously. This design eliminates the need for additional power components such as motors, simplifying the overall equipment structure and achieving adaptive matching where cleaning starts when the lifting cables move and stops when they stop, synchronizing the cleaning rhythm with the lifting cable's operational status.

[0018] This invention integrates the cable management mechanism and the winding and cleaning mechanism into a single functional module via connecting side plates. The module is mounted on the bottom of the operating support platform, eliminating the need to modify the main structure of the original hoisting equipment, such as the main truss and suspension control mechanism. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a structural schematic diagram of a bridge deck hoisting device for a steel truss bridge according to the present invention from another perspective; Figure 3 This is a structural schematic diagram of a bridge deck hoisting device for a steel truss bridge according to the present invention from another perspective. Figure 4 This is a schematic diagram of the structure of the cable management mechanism, linkage mechanism, and winding and cleaning mechanism in this invention; Figure 5 This is a partially enlarged view of the cable management mechanism, linkage mechanism, and winding and cleaning mechanism in this invention; Figure 6 This is a partial exploded view of the linkage mechanism in this invention; Figure 7 yes Figure 6 A magnified view of a portion of region A in the middle; Figure 8 This is a partial exploded view of the cable management mechanism, linkage mechanism, and winding and cleaning mechanism in this invention from another perspective.

[0020] In the diagram: 1. Main truss; 2. Operating support platform; 3. Cable management mechanism; 30. Central column; 31. Upper support; 32. Anti-sway pressure roller; 33. Connecting side plate; 4. Lifting steel cable; 5. Rewinding and cleaning mechanism; 51. Lower support; 52. Support shaft; 53. Outer sleeve; 54. Linkage mechanism; 541. Lower roller; 542. Upper roller; 543. Drive belt; 544. Connecting shaft; 545. Central roller; 55. High-pressure blowing mechanism; 551. Central groove; 552. Rotary disk; 553. Support plate; 554. Guide rod; 555. Rack; 556. Support spring; 557. Protrusion block; 558. Support gear; 559. Air nozzle; 560. High-pressure air pipe; 6. Horizontal reinforcing beam; 7. Anchoring and walking mechanism; 8. Walking assembly; 9. Suspension control mechanism; 91. Drive box; 92. Rewinding frame. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0022] Example: Please refer to Figures 1-8 A bridge deck hoisting device for steel truss bridges includes at least two main trusses 1 arranged at relative intervals. A cross bracing beam 6 is fixedly arranged between the main trusses 1 to enhance the overall support rigidity. An anchoring and traveling mechanism 7 is assembled at the bottom of the main trusses 1. An electrical control box is integrated on the anchoring and traveling mechanism 7. A traveling component 8 is installed at the bottom of the anchoring and traveling mechanism 7. (The anchoring and traveling mechanism 7 and the traveling component 8 are prior art and will not be described in detail here.) The anchoring and traveling mechanism 7 is electrically connected to the electrical control box, and the overall positioning and on-site deployment of the device can be realized under the power supply of the electrical control box. The main truss 1 has symmetrically fixed operating support platforms 2 on both sides of its top. The operating support platform 2 is equipped with a suspension control mechanism 9. The suspension control mechanism 9 includes a drive box 91 and a retractor 92 fixedly installed on the operating support platform 2. The drive box 91 is electrically connected to the electrical control box. When in use, the electrical control box can supply power to the drive box 91. (The drive box 91 is existing technology and will not be described in detail here.) The power output end of the drive box 91 is fixedly connected to the retractor 92. The retractor 92 is wound with a lifting steel cable 4. The lifting steel cable 4 adopts a multi-strand parallel arrangement structure, which can evenly distribute the huge lifting load of the steel truss beam, ensuring balanced force and stable operation during the lifting operation. When in use, the suspension control mechanism 9 provides rotational power through the drive box 91, which drives the winding frame 92 to rotate in both directions at a uniform speed, thereby achieving stable winding and lowering of the lifting steel cable 4. The multi-strand parallel lifting steel cable 4 can distribute the single-point load during the hoisting of the steel truss, effectively improving the hoisting stability and avoiding deformation and damage caused by excessive force on a single cable, thus providing stable power support for the precise alignment and hoisting of the steel truss.

[0023] Please see Figures 5-6 and Figure 8 In one embodiment, a cable management mechanism 3 is provided on the operating support platform 2. The cable management mechanism 3 includes an upper support 31 fixed to the bottom of the operating support platform 2, a central column 30 rotatably connected to the upper support 31, and an anti-sway pressure wheel 32 that presses against the surface of the lifting cable 4 fixedly on the central column 30. The anti-sway pressure wheel 32 has a limiting groove on its side wall that matches the lifting cable 4. During the raising and lowering of the lifting cable 4, the anti-sway pressure wheel 32, which is pressed against the lifting cable 4, can roll under the action of friction. The limiting groove on the side wall of the anti-sway pressure wheel 32 independently limits and guides each strand of the lifting cable 4, and regulates the arrangement of multiple strands of the lifting cable 4 in real time. This effectively restricts the lateral movement and swaying of the lifting cable, prevents adjacent lifting cables from rubbing against each other, getting tangled and misaligned, and continuously ensures the regularity and stability of the raising and lowering process.

[0024] Specifically, there are at least two anti-sway pressure rollers 32. These two anti-sway pressure rollers 32 are spaced apart and rotatably mounted on the upper support 31 via a central column 30. The lifting cable 4 passes through the two spaced-apart anti-sway pressure rollers 32. In this embodiment, two rotatably mounted anti-sway pressure rollers 32 are arranged side-by-side on one side of the lifting cable 4. The two anti-sway pressure rollers 32 on one side are spaced apart along the moving direction of the lifting cable 4. By providing at least two anti-sway pressure rollers 32, the reliability of limiting and guiding the lifting cable 4 is improved.

[0025] In one embodiment, a winding and cleaning mechanism 5 is provided on one side of the upper support 31. The winding and cleaning mechanism 5 is used to clean impurities on the lifting steel cable 4. Specifically, a connecting side plate 33 is fixed to the bottom of the upper support 31, and the winding and cleaning mechanism 5 is installed on the connecting side plate 33.

[0026] Please see Figures 6-8 The winding and cleaning mechanism 5 includes a lower support 51, a support shaft 52, an outer sleeve 53, and a linkage mechanism 54. The lower support 51 is fixed to the bottom of the side wall of the connecting side plate 33. The support shaft 52 is rotatably connected to the lower support 51, and the outer sleeve 53 is fixedly sleeved on the support shaft 52. The outer wall of the outer sleeve 53 is equipped with wire brushes for cleaning the lifting cable 4. The support shaft 52 is connected to the central column 30 via the linkage mechanism 54. The winding and cleaning mechanism 5 can achieve passive linkage operation by relying on the movement of the lifting cable 4. Under the transmission cooperation of the linkage mechanism 54, the support shaft 52 drives the outer sleeve 53 to rotate synchronously, so that the wire brushes on the surface of the outer sleeve 53 continuously roll and clean the outer wall of the lifting cable 4. This can remove hard impurities such as welding slag, mud, and rust adhering to the surface of the lifting cable in real time, preventing impurities from embedding into the gaps in the cable body during winding, and preventing damage to the lifting cable caused by the hardening of impurities from the source. Please refer to [link to relevant documentation]. Figures 5-6 and Figure 8 Specifically, the linkage mechanism 54 includes a lower roller 541, an upper roller 542, and a drive belt 543. The lower roller 541 is fixedly sleeved on one end of the support shaft 52, and the upper roller 542 is fixedly sleeved on the end of the central column 30. The drive belt 543 is tensioned between the lower roller 541 and the upper roller 542. When the linkage mechanism 54 is working, the movement of the lifting steel cable 4 drives the central column 30 to rotate, which in turn drives the upper roller 542 to rotate synchronously. Power is transmitted through the tensioned drive belt 543, driving the lower roller 541 to rotate synchronously with the support shaft 52. No additional power source is required throughout the process, realizing a purely mechanical synchronous linkage transmission.

[0027] Furthermore, the linkage mechanism 54 also includes a connecting shaft 544 and a central roller 545. The connecting shaft 544 is rotatably connected to the connecting side plate 33, and the central roller 545 is fixedly sleeved on one end of the connecting shaft 544. The drive belt 543 is wound around the central roller 545, and the central roller 545 is used to tension the drive belt 543. The central roller 545 plays a tensioning and guiding role for the drive belt 543, ensuring smooth transmission without slippage.

[0028] In this embodiment, there are at least two support shafts 52, each of which is fitted with an outer sleeve 53. The at least two support shafts 52 are located on opposite sides of the lifting cable 4. There are also two linkage mechanisms 54, located on opposite ends of each support shaft 52, and each linkage mechanism 54 is used to drive the support shafts 52 located on opposite sides of the lifting cable 4 to rotate. By providing support shafts 52 and outer sleeves 53 on opposite sides of the lifting cable 4, the cleaning effect on the lifting cable 4 is improved.

[0029] Specifically, the bottom of the upper support 31 has two spaced-apart connecting side plates 33 fixedly attached. The lifting cable 4 is located between the two connecting side plates 33. The support shaft 52 is rotatably disposed between the two connecting side plates 33. Two linkage mechanisms 54 are respectively installed on the two connecting side plates 33 and are used to drive the support shafts 52 located on opposite sides of the lifting cable 4 to rotate. The upper rollers 542 of different linkage mechanisms 54 can be installed on different central columns 30.

[0030] Specifically, there are at least two support shafts 52 on each side of the lifting cable 4, and each support shaft 52 is fitted with an outer sleeve 53. The support shafts 52 on the same side of the lifting cable 4 are arranged side by side along the moving direction of the lifting cable 4. The number of lower rollers 541, upper rollers 542, and drive belts 543 in each linkage mechanism 54 is the same as the number of support shafts 52 on the same side of the lifting cable 4. Each lower roller 541 is correspondingly set at one end of a support shaft 52. Different upper rollers 542 can be set on the same central column 30 or different central columns 30. Each lower roller 541 is connected to an upper roller 542 through a drive belt 543.

[0031] In this embodiment, the linkage mechanism 54 has two drive belts 543. The connecting shaft 544 and the center roller 545 are located between the upper roller 542 and the lower roller 541, so that the center roller 545 is located between the two drive belts 543, so that the inner wall of one drive belt 543 is pressed against one side of the center roller 545, and the outer wall of the other drive belt 543 is pressed against the other side of the center roller 545.

[0032] In other embodiments, the linkage mechanism 54 can also be implemented through other transmission methods, as long as it can drive the central column 30 to rotate by moving the lifting cable 4, and then drive the support shaft 52 and the outer sleeve 53 to rotate synchronously through the linkage mechanism 54. Please refer to Figures 5-8 In one embodiment, a high-pressure blowing mechanism 55, which is linked and cooperates with the linkage mechanism 54, is mounted on the connecting side plate 33. The high-pressure blowing mechanism 55 is located on one side of the outer sleeve 53 and is used to blow clean the surface of the lifting cable 4, thereby further cleaning the surface of the lifting cable 4. Specifically, the high-pressure blowing mechanism 55 is located between the outer sleeve 53 and the anti-sway pressure wheel 32.

[0033] In this embodiment, the high-pressure purging mechanism 55 includes a rotating disk 552, a support plate 553, a swing assembly, and an air nozzle 559. The rotating disk 552 is fixedly sleeved on the connecting shaft 544 and can rotate synchronously with the connecting shaft 544. The support plate 553 is fixedly installed on the connecting side plate 33. The swing assembly is set on the support plate 553, and the air nozzle 559 is installed on the swing assembly. The rotation of the rotating disk 552 drives the air nozzle 559 to swing relative to the lifting steel cable 4 through the swing assembly. The air nozzle 559 is connected to the high-pressure air pipe 560 through a connecting hose. The high-pressure air pipe 560 is fixedly arranged on the connecting side plate 33. The high-pressure air pipe 560 is used to connect to external air source equipment, and a control valve for regulating the air passage is installed on the pipe body of the high-pressure air pipe 560. The connecting shaft 544 rotates and drives the rotating disk 552 to rotate continuously. The rotating disk 552 drives the air nozzle 559 to swing relative to the lifting steel cable 4 through the swing component, thereby realizing the reciprocating swing of the air nozzle 559. Combined with the high-pressure airflow output from the high-pressure air pipe 560, the cleaning lifting steel cable 4 is swept in a multi-angle full-coverage manner to thoroughly remove residual fine impurities.

[0034] Specifically, the swing assembly includes a guide rod 554, a rack 555, a support spring 556, and a support gear 558. The guide rod 554 is slidably mounted on the support plate 553. One end of the guide rod 554 is fixedly connected to the rack 555, which slides with the support plate 553. The end of the guide rod 554 away from the rack 555 is connected to the surface of the rotating disk 552. The rotation of the rotating disk 552 periodically pushes the guide rod 554 to complete the reciprocating sliding motion. The direction of movement of the guide rod 554 and the rack 555 is the width direction of the lifting cable 4. The top of the support plate 553 is rotatably equipped with a support gear 558 that meshes with the rack 555, and an air nozzle 559 is mounted on the top of the support gear 558.

[0035] Furthermore, at least two protrusions 557 are spaced apart around the axis of the rotating disk 552. The rotating disk 552 rotates so that the guide rod 554 can abut against the protrusions 557, and the guide rod 554 can be periodically pushed to complete the reciprocating sliding movement.

[0036] In this embodiment, the swing assembly also includes a support spring 556. The end of the rack 555 is connected to the support plate 553 through the support spring 556. The support spring 556 is used to provide elastic force to the rack 555 in the direction of the guide rod 554. The end of the guide rod 554 away from the rack 555 abuts against and fits against the surface of the rotating disk 552 under the action of the support spring 556. When the connecting shaft 544 and the central roller 545 rotate synchronously under the drive belt 543, they drive the rotating disk 552 to rotate continuously. The protrusions 557 on the surface of the rotating disk 552 periodically push the guide rod 554, pushing the rack 555 to slide and compress the support spring 556. Through the meshing of the support gear 558, the air nozzle 559 is driven to deflect in a specific direction. After the protrusions 557 disengage, the support spring 556 rebounds and resets, driving the air nozzle 559 to return to its original position in the opposite direction. This enables the air nozzle 559 to swing back and forth. Combined with the high-pressure airflow output from the high-pressure air pipe 560, the cleaning of the lifting steel cable 4 is fully covered from multiple angles to thoroughly remove residual fine impurities.

[0037] In this embodiment, there are multiple support gears 558, which are arranged on the support plate 553 along the moving direction of the guide rod 554. Each support gear 558 can be equipped with an air nozzle 559. In other embodiments, different support gears 558 can mesh with each other to provide transmission efficiency.

[0038] In this embodiment, a central groove 551 is provided on the side of the connecting side plate 33 facing the lifting steel cable 4, and the rotating disk 552 is rotatably installed in the central groove 551, providing installation space for the central groove 551 and the rotating disk 552.

[0039] In one embodiment, the steel truss bridge closure device also includes a protective shell (not shown). The cable management mechanism 3 and the winding and cleaning mechanism 5 are both housed within the protective shell. The top of the protective shell has a perforation for the lifting steel cable 4 to pass through, and the bottom of the protective shell is open to allow any debris to fall off. The protective shell helps protect the cable management mechanism 3 and the winding and cleaning mechanism 5, thus extending their service life. In other embodiments, the protective shell can be disassembled to facilitate the removal of debris.

[0040] This application discloses a bridge deck hoisting device for steel truss bridges. In use, the main truss 1 is first installed on the cantilever end of the steel truss girder via a bottom anchoring and traveling mechanism 7 and a traveling assembly 8. The overall structural strength and installation stability of the device are ensured by the transverse reinforcing beams 6 connecting the main trusses 1. When the steel truss girder hoisting construction begins, the drive box 91 of the suspension control mechanism 9 is activated. The drive box 91 outputs power to drive the retractor 92 to rotate at a uniform speed. Multiple parallel lifting steel cables 4 smoothly lift and suspend the steel truss girder splicing section, accurately transferring it to the preset splicing elevation and alignment position, completing the splicing operation.

[0041] Throughout the entire process of lifting cable 4 being raised, lowered, and hoisted, the cable management mechanism 3 works continuously in coordination. As the lifting cable 4 moves relative to each other, it moves against the surface of the anti-sway pressure wheel 32. The frictional resistance drives the central column 30 to rotate continuously. Relying on the limiting groove on the side wall of the anti-sway pressure wheel 32, the multiple strands of lifting cable 4 are bundled, regulated, and constrained, effectively suppressing the lateral deviation, disordered swinging, and mutual friction and wear of the lifting cable 4, ensuring that the lifting cable 4 is arranged neatly and is under stable force during hoisting. Simultaneously, during the rotation of the central column 30, the upper roller 542 at the end rotates synchronously. Through the transmission action of the drive belt 543, the lower roller 541, support shaft 52, and outer sleeve 53 rotate synchronously as a whole, causing the outer wire brush of the outer sleeve 53 to continuously roll and clean the surface of the lifting cable 4. This can remove hard impurities such as welding slag, rust, and mud adhering to the surface of the lifting cable 4 during high-altitude hoisting construction in real time, preventing hard impurities from embedding into the gaps of the cable body and hardening as the lifting cable 4 is wound up, or from being wound into the winding frame 92. This effectively prevents the lifting cable 4 from being scratched by pressure and from fatigue wire breakage, effectively improving the reliability of the winding frame 92 in winding the lifting cable 4, and increasing the long-term load-bearing stability and service life of the lifting cable 4.

[0042] Meanwhile, during the operation of the drive belt 543, the connecting shaft 544 is driven to rotate synchronously by the central roller 545, which in turn drives the rotating disk 552 to rotate continuously. During the rotation of the rotating disk 552, the protrusions 557 arranged on the disk surface periodically contact the push guide rod 554, pushing the guide rod 554 and the rack 555 to slide laterally along the support plate 553, and compressing the support spring 556 to store elastic potential energy; during the sliding of the rack 555, the support gear 558 is driven to rotate through the meshing action of the support gear 558, which drives the top air nozzle 559 to swing in a directional direction; when the protrusions 557 disengage from the contact position of the guide rod 554 as the rotating disk 552 rotates, the support spring 556 releases elastic potential energy, pushes the rack 555 and the guide rod 554 to slide back to their original positions, and drives the air nozzle 559 to swing back to its original position, thus realizing the continuous reciprocating swing motion of the air nozzle 559.

[0043] During construction, the control valve of the high-pressure air pipe 560 is opened, and the high-pressure airflow is continuously delivered to the air nozzle 559 and sprayed out. Combined with the reciprocating oscillating motion of the air nozzle 559, a multi-angle, full-coverage high-pressure blowing operation is performed on the lifting cable 4 after mechanical cleaning by the wire brush on the outer sleeve 53, thoroughly removing residual fine dust and loose deposits from the surface of the lifting cable 4. The dual cleaning structure of mechanical roller brush cleaning and high-pressure oscillating blowing ensures the cleaning effect of the lifting cable 4 and prevents impurities from accumulating and damaging the cable body during winding. The entire device relies on the self-moving power of the lifting cable 4 during hoisting operations to achieve purely mechanical linkage cleaning and oscillating blowing, requiring no additional electrical control components or independent drive equipment. It has a simple structure, reliable operation, and can adapt to the complex construction conditions of bridges in the field at high altitudes with abundant dust and impurities.

[0044] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A bridge deck hoisting device for steel truss bridges, comprising a main truss (1), characterized in that: The main truss (1) is provided with an operating support platform (2) at its top. A suspension control mechanism (9) is provided on the operating support platform (2). A lifting steel cable (4) is wound around the suspension control mechanism (9). A cable management mechanism (3) is provided on the operating support platform (2). The cable management mechanism (3) includes an upper support (31) fixed to the bottom of the operating support platform (2). A central column (30) is rotatably connected to the upper support (31). An anti-sway pressure wheel (32) is fixedly sleeved on the central column (30) and pressed tightly against the lifting steel cable (4). A groove corresponding to the lifting steel cable (4) is opened on the side wall of the anti-sway pressure wheel (32). The bottom of the support (31) is provided with a connecting side plate (33), and a winding and cleaning mechanism (5) is provided on the connecting side plate (33); the winding and cleaning mechanism (5) includes a lower support (51), a support shaft (52), an outer sleeve (53) and a linkage mechanism (54). The lower support (51) is fixed to the bottom of the side wall of the connecting side plate (33), and the support shaft (52) is rotatably connected to the lower support (51). The outer sleeve (53) is fixedly sleeved on the support shaft (52), and a wire brush for rolling and lifting the steel cable (4) is provided on the outer sleeve (53). The support shaft (52) is connected to the central column (30) through the linkage mechanism (54).

2. The bridge deck hoisting device for steel truss bridges according to claim 1, characterized in that: The linkage mechanism (54) includes a lower roller (541), an upper roller (542) and a drive belt (543). The lower roller (541) is fixedly sleeved on one end of the support shaft (52), and the upper roller (542) is fixedly sleeved on one end of the central column (30). The drive belt (543) is tensioned on the lower roller (541) and the upper roller (542).

3. A bridge deck hoisting device for a steel truss bridge according to claim 2, characterized in that: The linkage mechanism (54) also includes a connecting shaft (544) and a central roller (545). The connecting shaft (544) is rotatably connected to the connecting side plate (33). One end of the connecting shaft (544) is fixedly sleeved with the central roller (545). The drive belt (543) is wound around the central roller (545). The central roller (545) is used to tension the drive belt (543).

4. A bridge deck hoisting device for a steel truss bridge according to claim 2, characterized in that: There are at least two support shafts (52), and each support shaft (52) is fitted with an outer sleeve (53). The at least two support shafts (52) are located on opposite sides of the lifting cable (4). The bottom of the upper support (31) is fixed with two spaced connecting side plates (33). The lifting cable (4) is located between the two connecting side plates (33). The support shafts (52) are rotatably arranged between the two connecting side plates (33). There are two linkage mechanisms (54). The two linkage mechanisms (54) are installed on the two connecting side plates (33) respectively and are used to drive the support shafts (52) located on opposite sides of the lifting cable (4) to rotate.

5. A bridge deck hoisting device for steel truss bridges according to any one of claims 1-4, characterized in that: The connecting side plate (33) is equipped with a high-pressure purging mechanism (55) that works in conjunction with the linkage mechanism (54). The high-pressure purging mechanism (55) is located on one side of the outer sleeve (53) and is used to purge the surface of the lifting cable (4).

6. A bridge deck hoisting device for a steel truss bridge according to claim 5, characterized in that: The high-pressure purging mechanism (55) includes a rotating disk (552), a support plate (553), a swing assembly, and an air nozzle (559). The rotating disk (552) is fixedly sleeved on the connecting shaft (544) and can rotate synchronously with the connecting shaft (544). The support plate (553) is fixedly installed on the connecting side plate (33). The swing assembly is set on the support plate (553). The air nozzle (559) is installed on the swing assembly. The rotation of the rotating disk (552) drives the air nozzle (559) to swing relative to the lifting cable (4) through the swing assembly.

7. A bridge deck hoisting device for a steel truss bridge according to claim 6, characterized in that: The swing assembly includes a guide rod (554), a rack (555), and a support gear (558). The guide rod (554) is slidably mounted on the support plate (553). One end of the guide rod (554) is fixedly connected to the rack (555) which slides with the support plate (553). The end of the guide rod (554) away from the rack (555) is connected to the rotating disk (552). The rotation of the rotating disk (552) can periodically push the guide rod (554) to complete the reciprocating sliding motion. The top of the support plate (553) is rotatably equipped with a support gear (558) that meshes with the rack (555). The air nozzle (559) is mounted on the top of the support gear (558).

8. A bridge deck hoisting device for a steel truss bridge according to claim 7, characterized in that: The swing assembly also includes a support spring (556). The end of the rack (555) is connected to the support plate (553) through the support spring (556). The support spring (556) provides elastic force to the rack (555) in the direction of the guide rod (554). The end of the guide rod (554) away from the rack (555) abuts against the surface of the rotating disk (552) under the action of the support spring (556). At least two protrusions (557) are arranged at intervals around the axis of the rotating disk (552). The rotating disk (552) rotates so that the guide rod (554) can abut against the protrusions (557) to periodically push the guide rod (554) to complete the reciprocating sliding movement.

9. A bridge deck hoisting device for a steel truss bridge according to claim 6, characterized in that: The air nozzle (559) is connected to the high-pressure air pipe (560) via a hose. The high-pressure air pipe (560) is fixed on the connecting side plate (33). The high-pressure air pipe (560) is used to connect to external air source equipment. The high-pressure air pipe (560) is equipped with a control valve to regulate the opening and closing of the air passage.

10. A bridge deck hoisting device for a steel truss bridge according to any one of claims 1-4, characterized in that: It includes at least two main trusses (1) arranged at relative intervals, with a cross bracing beam (6) between the main trusses (1), an anchoring and walking mechanism (7) at the bottom of the main trusses (1), an electrical control box on the anchoring and walking mechanism (7), and a walking component (8) installed at the bottom of the anchoring and walking mechanism (7).

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