A telescopic and movable under-mounted construction platform suitable for steel-concrete composite beams

Abstract

This utility model belongs to the field of bridge engineering technology, specifically disclosing a retractable and mobile under-mounted construction platform suitable for steel-concrete composite beams. It includes a load-bearing truss system, a retractable adjustment system, an under-mounted operating platform system, and a mobile walking system. Two load-bearing truss systems are provided, arranged opposite each other. Each load-bearing truss system includes several mesh support frames, with upper and lower connecting channels formed between adjacent mesh support frames. This utility model provides a retractable and mobile under-mounted construction platform suitable for steel-concrete composite beams. By setting up a retractable adjustment system to achieve dynamic adjustment of the working width, combined with the convenient movement function of the mobile walking system and the optimized design of the overall structure, it effectively solves the problems of difficult width adjustment, cumbersome movement operation, and insufficient stability of traditional platforms. It has the advantages of rapid retraction and adjustment of the working width, convenient and reliable movement, and high stability.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, and in particular to a telescopic and mobile under-mounted construction platform suitable for steel-concrete composite beams. Background Technology

[0002] In bridge engineering practice, the construction of steel-concrete composite beam structures often involves critical operations such as welding, painting, inspection, and maintenance beneath the beam. These operations are typically conducted in complex environments, such as at high altitudes, near water, or near cliffs, where space is limited and the risk factor is high, posing severe challenges to the safety performance, ease of operation, and structural adaptability of the construction platform.

[0003] Existing suspended construction platforms mostly adopt a fixed design, making it difficult to dynamically adjust them according to the actual span and geometry of the steel-concrete composite beams. This results in the platform width being unable to flexibly match different bridge structures, limiting the construction coverage area. Furthermore, traditional platforms require repeated disassembly and reassembly during movement, a cumbersome process that not only extends the construction period but also makes them prone to swaying or instability due to insecure temporary fixing. Especially when moving, the platforms lack effective anti-overturning mechanisms, making them susceptible to overturning moments when encountering wind loads or eccentric construction loads, seriously threatening the safety of workers.

[0004] Furthermore, existing platforms lack adequate protective measures in their suspended operation areas, and their access paths are poorly designed, increasing the risk of falls from heights. These problems make traditional construction methods unable to meet the comprehensive requirements of modern bridge engineering for efficiency, safety, and economy. There is an urgent need for a new type of suspended construction platform that can quickly adjust its working width, move reliably and conveniently in the longitudinal direction, and provide all-around stable support.

[0005] In summary, existing hanging construction platforms suffer from difficulties in adjusting the working width and poor stability. Utility Model Content

[0006] This invention provides a telescopic and movable under-mounted construction platform suitable for steel-concrete composite beams, which can solve the problems of difficulty in adjusting the working width and poor stability of existing under-mounted construction platforms.

[0007] A retractable and movable under-mounted construction platform suitable for steel-concrete composite beams includes: The load-bearing truss system includes two load-bearing truss systems arranged opposite each other. Each load-bearing truss system includes several mesh support frames, and an upper and lower connecting channel is formed between two adjacent mesh support frames. The mesh support frame is a mesh structure formed by connecting several upper platform longitudinal beams and several upper platform small cross beams. Both ends of the mesh support frame are provided with upper platform cross beams, and the top of the mesh support frame is provided with a patterned steel plate. A telescopic adjustment system, comprising a plurality of extension members, wherein the extension members are disposed on the upper platform crossbeam of the load-bearing truss system; The lower-mounted operation platform system is located below the load-bearing truss system, and the lower-mounted operation platform system and the load-bearing truss system are connected by several connectors. A mobile walking system is provided on a load-bearing truss system. The mobile walking system includes two sets of detachable mobile pulleys, which are respectively located at both ends of the load-bearing truss system.

[0008] This utility model provides a retractable and movable under-mounted construction platform suitable for steel-concrete composite beams, which, compared with the prior art, has the following beneficial effects, but is not limited to: This applicable steel-concrete composite beam telescopic mobile suspended construction platform utilizes a mesh support frame, which can be understood as a planar frame structure composed of multiple intersecting components. Its main function is to distribute loads and provide a stable support foundation. Specifically, the mesh support frame can be used to fix the upper platform's longitudinal beams and lower crossbeams together by welding or bolting, forming a relatively integrated mesh structure. The extension component, a key part for adjusting the platform width, is installed on the upper platform's crossbeams and can be adjusted in length via mechanical locking. The suspended operating platform system is connected to the load-bearing truss system via connectors, and its main function is to provide working space for construction personnel. The detachable moving pulleys in the mobile walking system are mainly used to enable the longitudinal movement of the load-bearing truss system.

[0009] This is a telescopic and mobile under-mounted construction platform suitable for steel-concrete composite beams. It achieves dynamic adjustment of the working width through a telescopic adjustment system. Combined with the convenient movement function of the mobile walking system and the optimized design of the overall structure, it effectively solves the problems of difficult width adjustment, cumbersome movement operation and insufficient stability of traditional platforms. It has the advantages of rapid telescopic adjustment of working width, convenient and reliable movement, and high stability.

[0010] Furthermore, protective railings are provided at the edges of the load-bearing truss system.

[0011] Furthermore, the two adjacent mesh support frames are connected by a number of connecting beams.

[0012] Furthermore, the extension is connected to the upper platform crossbeam by bolts.

[0013] Furthermore, the lower operating platform system includes a bottom grid frame and several lower platform top crossbeams located above the bottom grid frame; The bottom space frame is connected to the top crossbeam of the lower platform via a connecting chord of the lower platform.

[0014] Furthermore, the connector is composed of several upper and lower platform connecting windows, one end of which is connected to the lower hanging operation platform system, and the other end of which is connected to the load-bearing truss system.

[0015] Furthermore, the upper and lower platform connecting the decorative window includes an upper horizontal beam for the decorative window and several decorative window string rods provided on the upper horizontal beam.

[0016] Furthermore, it also includes a sloping ladder system, wherein multiple sloping ladder systems are provided, and the upper and lower ends of the sloping ladder systems are respectively connected to the load-bearing truss system and the lower-hanging operating platform system; The inclined stair system includes two side handrail assemblies and a plurality of inclined stair steps disposed between the two side handrail assemblies; The edge handrail assembly includes a sloping ladder beam and a sloping ladder fixing crossbeam disposed on the sloping ladder beam, with the end of the sloping ladder fixing crossbeam away from the sloping ladder beam connected to a connector.

[0017] Furthermore, the inclined ladder system is provided with a channel guard ring on the outside, and the top of the channel guard ring is connected to the upper and lower connecting channels.

[0018] Furthermore, the mobile walking system also includes anti-tipping blocks. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 A structural front view of a retractable and movable under-mounted construction platform for steel-concrete composite beams provided by this utility model; Figure 2 Left view of a structure for a retractable and movable under-mounted construction platform for steel-concrete composite beams provided by this utility model; Figure 3 A top view of the installation structure of the upper horizontal beam and inclined ladder beam of the window frame for a retractable and movable under-hanging construction platform for steel-concrete composite beams provided by this utility model; Figure 4 A top view of the bottom space frame structure of a retractable and movable under-mounted construction platform for steel-concrete composite beams provided by this utility model; Figure 5 The structural top view of a mesh support frame for a retractable and movable under-mounted construction platform for steel-concrete composite beams provided by this utility model.

[0020] Explanation of reference numerals in the attached figures: 1. Guardrail; 2. Upper platform crossbeam; 3. Upper platform longitudinal beam; 4. Patterned steel plate; 5. Sloping ladder fixing crossbeam; 6. Connecting window frame between upper and lower platforms; 7. Lower platform longitudinal beam; 8. Lower platform bottom crossbeam; 9. Lower platform connecting chord; 10. Sloping ladder beam; 11. Sloping ladder steps; 12. Lower platform top crossbeam; 13. Anti-tipping block; 14. Detachable movable pulley; 15. Crossbeam extension hole; 16. Window frame upper crossbeam; 17. Window frame chord; 18. Passageway guard ring; 19. Upper and lower connecting passage; 20. Lower platform small crossbeam; 21. Upper platform small crossbeam; 191. Connecting crossbeam; 201. Extension component. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0022] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, parts, or groups of features, integers, steps, or parts.

[0026] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, B and / or C can represent: B existing alone, B and C existing simultaneously, or C existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0027] like Figures 1 to 2 As shown in the figure, this utility model provides a telescopic and movable under-mounted construction platform suitable for steel-concrete composite beams, comprising: The load-bearing truss system has two load-bearing truss systems, which are arranged opposite each other. Each load-bearing truss system includes several mesh support frames. The upper and lower connecting channels 19 are formed between two adjacent mesh support frames. The mesh support frame is a mesh structure formed by connecting several upper platform longitudinal beams 3 and several upper platform small cross beams 21. The ends of both ends of the mesh support frame are provided with upper platform cross beams 2, and the top of the mesh support frame is provided with a patterned steel plate 4. The telescopic adjustment system includes several extensions 201, which are mounted on the upper platform beam 2 of the load-bearing truss system. The lower-mounted operating platform system is located below the load-bearing truss system and is connected to the load-bearing truss system by several connectors. The mobile walking system is installed on the load-bearing truss system. The mobile walking system includes two sets of detachable mobile pulleys 14, which are respectively installed at both ends of the load-bearing truss system.

[0028] The mesh support frame can be understood as a planar frame structure composed of multiple crisscrossing components. Its main function is to distribute loads and provide a stable supporting foundation. Specifically, the mesh support frame can be used to fix the upper platform longitudinal beams 3 and the upper platform small cross beams 21 together by welding or bolting, thus forming a relatively integral mesh structure. Furthermore, this mesh structure can also be implemented using other connection methods, such as riveting or snap-fit ​​connections, to meet different construction requirements.

[0029] The extension component 201 is a key component for adjusting the platform width. It is mounted on the upper platform crossbeam 2 and its length can be adjusted via mechanical locking. Specifically, the extension component 201 can be designed as a telescopic sleeve, changing its length through relative sliding between the inner and outer sleeves, and secured with pins or clamps. Alternatively, the extension component 201 can adopt a folding structure, connecting multiple segments via hinges, unfolding and locking as needed to achieve flexible adjustment of the platform width.

[0030] The suspended operating platform system is connected to the load-bearing truss system via connectors, and its main function is to provide working space for construction personnel. The connectors can be designed as rigid suspension structures, fixing the suspended operating platform system to the load-bearing truss system via welding or bolts. Alternatively, the connectors can employ flexible connection methods, such as suspending the suspended operating platform system from the load-bearing truss system using wire ropes or chains, to adapt to different construction environments.

[0031] The detachable movable pulleys 14 in the mobile walking system are mainly used to realize the longitudinal movement function of the load-bearing truss system. Specifically, the detachable movable pulleys 14 can be installed at both ends of the load-bearing truss system by means of pins or bolts, which facilitates quick assembly and disassembly when needed. Furthermore, the movable pulleys 14 can also be designed as rail-type pulleys, by laying temporary rails on the steel beams, so that the platform can move smoothly along the rails. Specifically, it can be moved by traction from a bridge crane or winch, and the movable pulleys 14 can be removed after being in place.

[0032] The innovation of this application lies in solving the safety, convenience, and adaptability issues of the working platform under the steel-concrete composite beam during construction by integrating a load-bearing truss system, a telescopic adjustment system, a suspended operating platform system, and a mobile walking system. Compared with existing technologies, this application enhances the overall rigidity of the platform through the mesh structure design of the mesh support frame, achieves flexible adjustment of the platform width through the mechanical adjustment of the extension 201, provides a comprehensive working space through the independent enclosed design of the suspended operating platform system, and ensures convenient movement and stable positioning of the load-bearing truss system through the detachable pulley design of the mobile walking system. This effectively overcomes the drawbacks of traditional construction methods and provides a completely new solution for the bottom and side construction of steel-concrete composite beams.

[0033] The working principle of this embodiment is as follows: The construction platform, through the coordinated operation of a load-bearing truss system, a telescopic adjustment system, a lower-mounted operating platform system, and a mobile walking system, solves the safety, convenience, and adaptability issues of the working platform under the steel-concrete composite beam during construction. The load-bearing truss system consists of two independent mesh-like load-bearing frames. Each mesh-like load-bearing frame is based on the upper platform longitudinal beam 3 and the upper platform small crossbeam 21 connected to form a mesh structure, thereby distributing the construction load and enhancing the overall rigidity. A vertical connecting passage 19 is formed between adjacent mesh-like load-bearing frames, facilitating rapid passage of personnel and equipment between different heights and significantly improving operational convenience. Furthermore, upper platform crossbeams 2 are installed at both ends of the mesh-like load-bearing frames to ensure the stability of the end supports, while checkered steel plates 4 are laid on the top to provide a non-slip operating surface, directly improving construction safety.

[0034] The telescopic adjustment system achieves mechanical adjustment and locking of the platform width through the cooperation of the extension component 201 and the upper platform crossbeam 2. Specifically, the extension component 201 is installed on the upper platform crossbeam 2, allowing for flexible adjustment of the platform's working width without the need for an additional foundation, thus adapting to steel-concrete composite beam structures of different spans. This design simplifies the adjustment mechanism and significantly improves the platform's adaptability.

[0035] The under-mounted operating platform system is connected to the load-bearing truss system through several connectors, forming an independent and enclosed working space. This provides a comprehensive working surface for various operations on the bridge web and bottom, avoiding the risk of direct contact between the platform and the beam in traditional methods, and enhancing operational safety and accessibility.

[0036] The mobile system includes two sets of detachable pulleys 14, respectively installed at both ends of the load-bearing truss system. During platform movement, the pulleys are installed to achieve smooth longitudinal movement; after positioning, the pulleys are removed, allowing the upper platform beam 2 to directly bear the load, thus ensuring the platform's anti-overturning stability. Therefore, this system not only ensures the platform's mobility in complex environments but also effectively improves construction safety after positioning.

[0037] In summary, the various systems have achieved a unified function of load-bearing, operation, passage, and protection through organic integration, and have jointly solved the problems of safety, convenience, and adaptability of the working platform under the beam in the construction of steel-concrete composite beams, providing reliable technical support for construction operations in complex high-altitude environments.

[0038] like Figures 1 to 2 As shown, in some embodiments of this utility model, a protective railing 1 is provided at the edge of the load-bearing truss system; Among them, guardrail 1 refers to the structure installed at the edge of the load-bearing truss system to prevent construction workers from accidentally falling. In practical applications, guardrail 1 can be made of steel pipes, structural steel, or other materials with sufficient strength and rigidity. Its purpose is to construct a continuous physical barrier to effectively block the risk of construction workers falling due to slipping or falling while working at heights.

[0039] In detail, guardrail 1 is directly installed at the edge of the load-bearing truss system, specifically covering the most dangerous boundary area of ​​the operating platform and preventing direct contact between personnel and the open surface. This arrangement fully utilizes the structural characteristics of the load-bearing truss system, seamlessly integrating the protective function into the platform body. This not only simplifies the installation process but also ensures the stability and reliability of the protective measures. In complex high-altitude environments such as bridge construction, this design significantly improves operational safety, providing reliable operational protection for construction personnel, while avoiding the introduction of additional support structures and maintaining the overall lightweight and flexibility of the platform.

[0040] Furthermore, the guardrail 1, together with the mesh support frame and upper platform beam 2 in the load-bearing truss system, forms a complete safety protection system. By installing guardrail 1 at the edge, safety hazards during high-altitude operations can be effectively addressed, especially in the construction of steel truss bridges, providing comprehensive safety guarantees for welding, painting, inspection, and maintenance operations.

[0041] like Figures 1 to 5 As shown, in some embodiments of this utility model, two adjacent mesh support frames are connected by a number of connecting beams 191. Specifically, the connecting beam 191 is a structural component used to provide a rigid connection between two adjacent mesh support frames. It can be made of profiles with high bending and shear resistance, such as I-beams, channel steel, or rectangular steel pipes. In practical applications, the connecting beam 191 is connected to the mesh support frame by bolts, welding, or other reliable fixing methods. Its purpose is to ensure that the relative positions of adjacent mesh support frames are fixed, avoiding misalignment or loosening due to external forces.

[0042] In detail, by setting up several connecting beams 191 between two adjacent mesh support frames, these connecting beams 191 can evenly transfer horizontal loads and construction loads, thereby effectively avoiding local stress concentration. Furthermore, the connecting beams 191 not only maintain the geometry and unobstructed flow of the upper and lower connecting channels 19, but also significantly enhance the overall rigidity and stability of the load-bearing truss system. In addition, multiple mesh support frames form a collaborative overall frame through the connecting beams 191, further improving the structural reliability of the platform during operation of the mobile walking system. This technical solution is particularly suitable for solving the problem of weak connections caused by the independent setting of mesh support frames, providing a guarantee for the safe passage of construction personnel and the stability of operations.

[0043] In summary, the above technical solutions not only solve the problem of the lack of a reliable fixed connection mechanism between adjacent mesh support frames, but also significantly improve the torsional stiffness and bending resistance of the entire load-bearing truss system, thereby ensuring the safety and stability of the construction platform in complex environments.

[0044] like Figures 1 to 5 As shown, in some embodiments of this utility model, the extension 201 is connected to the upper platform beam 2 by bolts.

[0045] Specifically, extension component 201 refers to a key component used to achieve width adjustment of the load-bearing truss system. It can be made of metal profiles with high strength and deformation resistance, aiming to provide a reliable mechanical connection point to ensure the stability of the construction platform under movement and load conditions. Among them, bolt connection is a detachable mechanical fixing method, which can be achieved by using high-strength bolts with nuts and washers, aiming to balance the strength of the connection with the flexibility of operation.

[0046] More specifically, several beam extension holes 15 are provided on the upper platform beam 2, and corresponding extension holes are provided on the extension piece 201. Bolts are passed through the beam extension holes 15 and the extension holes respectively to connect and fix the extension piece 201 to the upper platform beam 2. This technical solution achieves reliable fixation between the extension piece 201 and the upper platform beam 2 through bolt connection. In practical applications, when the width of the construction platform needs to be adjusted, the operator can quickly remove the bolts to move the position of the extension piece 201, thereby achieving precise adaptation of the platform size. This connection method avoids the irreversible adjustment defects caused by permanent connections such as welding. At the same time, the tightening effect of the bolts provides reliable shear and pull-out resistance when the platform moves or bears construction loads, preventing the connection from loosening due to vibration or external forces. In addition, bolt connection can be installed and disassembled on-site without special equipment, simplifying the construction process, reducing operational complexity, and enabling the telescopic adjustment system to maintain efficient response during frequent movement and positioning, thereby improving the safety and applicability of the construction platform.

[0047] Based on this, the bolted connection between the extension 201 and the upper platform beam 2, together with the mesh support frame and checkered steel plate 4 of the load-bearing truss system, ensures the overall rigidity and stability of the entire construction platform under different working conditions. Through the above technical solutions, the problems of unreliable connections, cumbersome adjustment processes, and difficult installation and disassembly are effectively solved, significantly improving the operational efficiency and safety of the construction platform.

[0048] like Figures 1 to 5 As shown, in some embodiments of this utility model, the lower-mounted operating platform system includes a bottom grid frame and several lower platform top crossbeams 12 disposed above the bottom grid frame; The bottom space frame is connected to the top crossbeam 12 of the lower platform via the lower platform connecting chord 9. Specifically, the bottom space frame refers to a grid frame structure that can be assembled using steel profiles of different specifications. Its purpose is to provide a foundational bearing surface for the entire lower-mounted operating platform system. The top crossbeam 12 of the lower platform can be understood as a supporting component arranged along the top of the bottom space frame. Its spacing and quantity can be selected according to actual construction needs, aiming to distribute construction loads and enhance the overall rigidity of the platform. The connecting chord 9 of the lower platform refers to the diagonal or vertical connector used to connect the bottom space frame and the top crossbeam 12 of the lower platform. It can be fixed by welding or bolting, aiming to form a triangular or mesh-like support system to improve the platform's torsional resistance and overall strength.

[0049] In detail, this scheme uses a bottom space frame as the basic bearing surface, and sets multiple lower platform top beams 12 above it to achieve a layered support layout in the vertical direction. This design can effectively distribute construction loads and avoid the local deformation problems that are prone to occur in single-planar structures. At the same time, the lower platform connecting chords 9 are set according to the corresponding positions of the grid nodes of the bottom space frame and the lower platform top beams 12, making the force flow path more uniform and significantly improving the platform's torsional resistance and overall strength. In addition, this structural design not only enhances the stability of the platform at high altitudes or in complex environments, but also simplifies the installation process, enabling it to quickly adapt to the operational requirements of different bridge structures. On this basis, the connecting parts between the above-mentioned lower-mounted operating platform system and the load-bearing truss system work together to further ensure the safety and reliability of the construction process.

[0050] The above technical solutions effectively solve the problems of insufficient overall platform rigidity and complex installation, providing a stable and efficient working surface for various operations on the bridge web and bottom.

[0051] like Figures 1 to 5 As shown, in some embodiments of this utility model, the bottom grid frame refers to a grid frame structure composed of lower platform longitudinal beams 7, lower platform bottom crossbeams 8, and lower platform small crossbeams 20. The bottom grid frame is composed of several grid frame structures, and a connecting grid frame is provided between two adjacent grid frame structures. That is, several lower platform longitudinal beams 7 and several lower platform small crossbeams 20 are connected to form a grid frame structure, and the connecting grid frame is a connecting grid frame formed by several lower platform bottom crossbeams 8 and connecting longitudinal beams.

[0052] Furthermore, the wire mesh frame structure corresponds one-to-one with the wire mesh support frame, and the connecting wire mesh frame corresponds one-to-one with the upper and lower connecting channels 19.

[0053] Specifically, each grid frame structure, through precise dimensional design and a rational layout, corresponds one-to-one with the mesh support frame, ensuring the stability and uniformity of the entire platform during load-bearing. The connecting grid frames cleverly link adjacent grid frame structures, forming a continuous support system, while also matching the upper and lower connecting passages, providing convenient access for construction personnel. This structure not only enhances the overall rigidity of the platform but also improves its adaptability to different construction environments, enabling the platform to maintain efficient and stable operation even when facing complex and varied bridge structures.

[0054] like Figures 1 to 5 As shown, in some embodiments of this utility model, the connector is composed of several upper and lower platform connecting windows 6. One end of the upper and lower platform connecting windows 6 is connected to the lower hanging operation platform system, and the other end of the upper and lower platform connecting windows 6 is connected to the load-bearing truss system.

[0055] Specifically, the upper and lower platform connecting window 6 refers to a connecting component with a mesh frame structure, which can be made of metal and connected by welding or bolting to form a stable geometric shape. The design of this structure is based on its geometric characteristics and mechanical distribution advantages, effectively dispersing dynamic loads and avoiding stress concentration. The feature that the connector consists of several upper and lower platform connecting windows 6 embodies the concept of multi-unit parallel layout, aiming to achieve redundant load distribution, thereby improving the system's fault tolerance and long-term reliability.

[0056] In detail, the connecting window 6 between the upper and lower platforms, as the core structure of the connector, plays a crucial role in the overall design. One end forms a rigid anchor with the lower operating platform system, ensuring stable support for the bottom grid and the top beam of the lower platform during operation, preventing swaying caused by personnel operation or environmental vibrations. The other end directly connects to the upper platform beam and the mesh support frame of the load-bearing truss system. This direct transmission path avoids energy loss in intermediate transition links, enabling the load-bearing truss system to efficiently absorb overturning moments and enhancing the platform's anti-overturning performance in complex environments. Furthermore, the introduction of the connecting window 6 not only simplifies the installation process but also adapts to the construction needs of steel-concrete composite beams of different spans through standardized components, providing a safe and reliable working interface for the lower operation. The overall design effectively solves the problems of insufficient connection rigidity and uneven load distribution by evenly distributing the load, enhancing structural rigidity, and optimizing the connection path, significantly reducing the risk of overturning and construction safety hazards during high-altitude operations.

[0057] like Figures 1 to 5 As shown, in some embodiments of this utility model, the upper and lower platform connecting window 6 includes an upper horizontal beam 16 and a plurality of window string rods 17 disposed on the upper horizontal beam 16. Specifically, the upper horizontal beam 16 of the window frame is a key component providing a lateral load-bearing foundation. It can be made of high-strength steel rectangular tubing or I-beams to evenly distribute vertical loads and dynamic vibrations, avoiding stress concentration at single points. The window frame chord 17 refers to the supporting components on the upper horizontal beam 16 that form a mesh-like layout. It can be fixed to the upper horizontal beam 16 by welding or bolting, with the purpose of dispersing shear stress and improving torsional stiffness through triangular geometric configuration.

[0058] In detail, the top of the upper horizontal beam 16 of the window can be connected to the upper platform horizontal beam 2, and its side can be connected to the lower platform top horizontal beam 12. The end of the window chord 17 furthest from the upper horizontal beam 16 is connected to the bottom space frame. This design, through the arrangement of the upper horizontal beam 16, provides a stable load-bearing frame for the window 6 connecting the upper and lower platforms, ensuring that construction loads are evenly distributed to the connection nodes, thus effectively preventing local bending failure. Simultaneously, the mesh arrangement of the window chord 17 optimizes the continuity of the load path, avoiding stress accumulation in local weak areas. This structural design not only enhances the overall rigidity of the connecting window but also maintains the reliability and durability of the upper and lower platform connection under dynamic working conditions. Furthermore, the combination of the horizontal beam and chord significantly improves the bending and torsional resistance of the connecting window, enabling it to reliably transfer loads and resist external interference in complex construction environments, thereby ensuring the safety of high-altitude operations.

[0059] Through the above technical solution, the upper and lower platform connecting window 6 achieves a high-strength and high-rigidity connection effect in the overall structure, solving the problem of deformation or failure caused by insufficient connection strength or rigidity, and providing a solid guarantee for the stability and safety of the construction platform.

[0060] like Figures 1 to 5 As shown, in some embodiments of this utility model, the telescopic and movable under-hanging construction platform applicable to steel-concrete composite beams also includes an inclined ladder system. Multiple inclined ladder systems are provided, and the upper and lower ends of the inclined ladder systems are respectively connected to the load-bearing truss system and the under-hanging operation platform system. The inclined stair system includes two side handrail assemblies and a plurality of inclined stair steps 11 disposed between the two side handrail assemblies; The side handrail assembly includes a sloping ladder beam 10 and a sloping ladder fixing beam 5 disposed on the sloping ladder beam 10, with one end of the sloping ladder fixing beam 5 away from the sloping ladder beam 10 connected to a connector.

[0061] The inclined ladder system refers to a structural device that provides a safe vertical passage between upper and lower platforms. It can be implemented using multiple sets of inclined ladders arranged in parallel, aiming to provide a convenient passage for construction workers while ensuring the safety and stability of the overall structure. The inclined ladder steps 11 are the specific components constituting the walking surface of the inclined ladder. They can be made of non-slip metal plates or treads with raised textures, aiming to improve the safety of construction workers walking in complex environments. The side handrail components are the structural units on both sides of the inclined ladder used for protection and support. They can be fixed to the inclined ladder beams 10 by welding or bolting, aiming to prevent people from slipping laterally and to enhance overall rigidity.

[0062] Furthermore, the multiple configuration options of the inclined ladder system allow construction workers to flexibly choose passageways according to actual operational needs, avoiding passage interruptions caused by single-lane congestion or malfunctions. The upper and lower ends of the inclined ladder system are directly connected to the load-bearing truss system and the lower-mounted operating platform system, respectively. This connection method not only ensures a tight coupling between the passageway and the main platform structure but also fully utilizes the existing platform's load-bearing capacity, eliminating the need for additional support points. The inclined ladder beam 10 in the side handrail assembly serves as the core load-bearing skeleton, evenly distributing personnel loads and transferring them through the inclined ladder fixing beam 5 to the connectors, ultimately transferring them to the main platform structure.

[0063] Specifically, the inclined ladder system corresponds one-to-one with the upper and lower connecting channels 19. More specifically, the inclined ladder system can be set between the connecting windows 6 of two adjacent upper and lower platforms. The connection between the inclined ladder fixed beam 5 and the connector utilizes the rigid node characteristics of the connecting windows 6 of the upper and lower platforms, achieving seamless integration with the main platform and avoiding the cumbersome process of independently installing the support structure, thereby enhancing the overall rigidity and ease of installation of the system.

[0064] More specifically, one end of the inclined ladder beam 10 can be connected to the upper platform crossbeam 2 on the load-bearing truss system, and the other end can be connected to the bottom space frame on the lower operating platform system. The connections between the inclined ladder beam 10 and the upper platform crossbeam 2 and the bottom space frame can all be secured with high-strength bolts, ensuring the stability and durability of the connection nodes. This connection method not only simplifies the installation process but also facilitates later maintenance and repair. At the same time, the cross-sectional design of the inclined ladder beam 10 is optimized, possessing sufficient bending and shear resistance to withstand the dynamic loads generated when construction personnel move on the inclined ladder, ensuring safety during construction.

[0065] The above technical solutions effectively solve the safety and efficiency issues of personnel movement between upper and lower platforms, ensure the safety of construction personnel in complex environments, and improve the overall smoothness of construction.

[0066] like Figures 1 to 5 As shown, in some embodiments of this utility model, a channel guard ring 18 is provided on the outside of the inclined ladder system, and the top of the channel guard ring 18 is connected to the upper and lower connecting channels 19.

[0067] In practical applications, the passageway guardrail 18 refers to the protective structure set on the outside of the inclined ladder system. It can be implemented in various forms such as metal railings, flexible protective nets, or rigid barriers. Its purpose is to provide a physical barrier for construction workers to prevent them from falling sideways during the climbing process. Among them, the upper and lower connecting passageways 19 can be understood as key passage nodes between adjacent mesh support frames in the load-bearing truss system. Its main function is to ensure the continuity and safety between different work areas.

[0068] Specifically, by installing a protective ring 18 on the outside of the inclined ladder system, this high-risk area can be specifically covered, forming an effective protective barrier. This design directly addresses the lack of obstruction on the outside of the inclined ladder structure, ensuring that the protective measures match the characteristics of the working environment. Simultaneously, the design of the top of the protective ring 18 connecting to the upper and lower connecting passages 19 achieves a seamless transition from the upper platform to the inclined ladder system, avoiding protective gaps at platform connections. Based on this design, construction personnel are always protected during movement, significantly improving the overall safety performance of the vertical passage. Furthermore, the combination of this solution with the load-bearing truss system and the lower-mounted operating platform system further enhances the safety and adaptability of the entire construction platform, exhibiting higher reliability, especially in complex environments such as high altitudes or near water.

[0069] like Figures 1 to 5 As shown, in some embodiments of this utility model, the mobile walking system further includes an anti-tipping block 13; In practical applications, the anti-tipping block 13 refers to a structural component used to enhance the stability of the platform, which can be implemented using an adjustable block. This block can provide support by adjusting its position under different working conditions. Its purpose is to solve the problem of the lack of a stable support mechanism for the platform in motion, and to avoid the risk of overturning due to external loads or operational imbalances.

[0070] Specifically, the design of the anti-tipping block 13 is closely tailored to the actual needs of the mobile system. Before the platform moves, the anti-tipping block 13 is disassembled and reinstalled in its offset position below, providing the necessary height for the moving pulleys and ensuring smooth platform movement. Once the platform is in place, the anti-tipping block 13 is reinstalled, its top pressing against the steel beam structure to form a rigid contact point, effectively dispersing the overturning moment and locking the platform's position. This mechanism is based on the state-switching characteristics of the mobile system between dynamic movement and static operation. Through the adjustable installation method of the block, it maintains the flexibility of the movement process while enhancing the structural stability after positioning. Furthermore, the anti-tipping block 13, together with the load-bearing truss system, the telescopic adjustment system, and the under-mounted operating platform system, forms a complete solution, significantly improving the safety and adaptability of the construction platform in complex environments.

[0071] Through the above technical solutions, the stability of the platform in both moving and stationary states is effectively guaranteed, solving the problem of overturning hazards in high-altitude operations, while also demonstrating the ingenuity of the overall design.

[0072] like Figures 1 to 5 As shown, in some embodiments of this utility model, the telescopic adjustment system further includes a locking mechanism for locking the extension 201 at the desired position on the upper platform beam 2. Specifically, the locking mechanism is a device that can constrain the position of the extension 201, which can be achieved through mechanical latches, pin structures, or bolt fixing. In practical applications, the locking mechanism is designed to ensure that the extension 201 is firmly constrained after adjustment, thereby preventing sliding displacement caused by external factors. In addition, the locking mechanism can also be easily unlocked through a quick-release mechanism for subsequent readjustment.

[0073] In detail, this technical solution solves the problem of the lack of a fixing mechanism for the extension component 201 after adjustment by introducing a locking mechanism. A tight connection is formed between the locking mechanism and the extension component 201, allowing it to transition from a temporary to a stable state after adjustment. Furthermore, the locking mechanism, together with the upper platform beam 2 of the load-bearing truss system and the extension component 201, ensures the rigidity and stability of the entire platform after width adjustment. Simultaneously, this design also ensures the safe operation of the mobile system, preventing the platform from overturning due to accidental slippage of the extension component 201 during positioning. Through this technical solution, not only is the overall safety of the construction platform improved, but its adaptability and reliability under complex working conditions are also significantly enhanced.

[0074] like Figures 1 to 5 As shown, in some embodiments of this utility model, the mobile walking system further includes a driving device for driving the detachable mobile pulley 14 to move.

[0075] Specifically, a drive device refers to a mechanical or electrical device that can provide an active driving force source, which can be achieved by means of electric motor drive, hydraulic drive, or pneumatic drive. In practical applications, the drive device ensures the stability and immediacy of power transmission through a mechanical connection with the detachable movable pulley 14. Its purpose is to simplify the platform movement operation process, reduce dependence on external traction equipment, and thus improve construction efficiency and safety.

[0076] In detail, the drive unit acts directly on the detachable movable pulley 14, transmitting driving force to the pulley through a mechanical transmission mechanism, enabling it to rotate autonomously and move the entire platform. This built-in drive mechanism avoids the complex preparation process of temporarily calling upon bridge cranes or winches in traditional methods, significantly improving the platform's adaptability in steel-concrete composite beam construction. Furthermore, the introduction of the drive unit allows construction personnel to adjust the platform's position more flexibly, especially at heights or in complex environments, enabling rapid response to position adjustment needs, thereby effectively improving overall work efficiency and safety. Based on the organic combination of the load-bearing truss system and the mobile walking system, this solution not only enhances the platform's autonomous movement capability but also further optimizes stability and convenience during construction.

[0077] like Figures 1 to 5 As shown, in some embodiments of this utility model, the platform moving pulley 14 is a detachable double-rimmed roller, which is installed after the upper platform crossbeam 2 is lifted before the platform is moved, and removed after the platform is moved into place, so that the upper platform crossbeam 2 is subjected to force.

[0078] In practical applications, detachable double-flange rollers refer to a pulley design with a double-sided limiting structure. They can be made of high-strength steel or composite materials to ensure they are always constrained within a predetermined path during track operation, effectively preventing derailment. The purpose of this design is to provide additional lateral stability through the double-flange structure while retaining detachability for quick adaptation to switching between moving and stationary states. The operation of lifting the upper platform beam 2 can be achieved using hydraulic jacks or other lifting devices. The aim is to create sufficient installation space beforehand, avoiding physical interference between the pulley and the steel beam structure, thereby simplifying the installation process and improving operational efficiency.

[0079] Specifically, the aforementioned technical solution significantly improves the stability and ease of operation of the platform during movement by optimizing the structural design and operation process of the movable pulleys. The design of the detachable double-rimmed rollers ensures that the pulleys always remain within the predetermined path during track operation, fundamentally solving the problem of derailment that is common with traditional pulleys. Furthermore, the operation step of installing the pulleys after lifting the upper platform beam 2 creates ample space by pre-lifting the beam, avoiding physical interference between the pulleys and the steel beam structure. This allows for precise positioning without repeated adjustments, greatly simplifying the operation process. In addition, the design of removing the pulleys after the platform is in place ensures that the upper platform beam 2 directly contacts the steel beam base plate, completely transferring the platform load to the main structure, thereby eliminating the risk of additional load on the pulleys when they are fixed. Finally, by removing the pulleys and making the upper platform beam 2 the core load-bearing point, not only is the overall rigidity of the platform strengthened, but the anti-overturning capacity is also significantly improved, ensuring the uniformity of load distribution and structural stability during construction. These improvements, together with other components of the load-bearing truss system and the mobile walking system, enable the platform to switch efficiently between mobile and stationary states, while ensuring the safety and reliability of the construction process.

[0080] Although the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A telescopic and movable under-mounted construction platform suitable for steel-concrete composite beams, characterized in that, include: The load-bearing truss system has two load-bearing truss systems, which are arranged opposite to each other. Each load-bearing truss system includes several mesh support frames. A vertical connecting channel (19) is formed between two adjacent mesh support frames. The mesh support frame is a mesh structure formed by connecting several upper platform longitudinal beams (3) and several upper platform small cross beams (21). The ends of both ends of the mesh support frame are provided with upper platform cross beams (2). The top of the mesh support frame is provided with a patterned steel plate (4). The telescopic adjustment system includes several extensions (201), which are mounted on the upper platform beam (2) of the load-bearing truss system. The lower-mounted operation platform system is located below the load-bearing truss system, and the lower-mounted operation platform system and the load-bearing truss system are connected by several connectors. A mobile walking system is provided on the load-bearing truss system. The mobile walking system includes two sets of detachable mobile pulleys (14), which are respectively located at both ends of the load-bearing truss system.

2. The telescopic and movable under-mounted construction platform for steel-concrete composite beams according to claim 1, characterized in that, The load-bearing truss system is equipped with guardrails (1) at its edges.

3. The telescopic and movable under-mounted construction platform for steel-concrete composite beams according to claim 1, characterized in that, The two adjacent mesh support frames are connected by a number of connecting beams (191).

4. The telescopic and movable under-mounted construction platform for steel-concrete composite beams according to claim 1, characterized in that, The extension (201) is connected to the upper platform crossbeam (2) by bolts.

5. The telescopic and movable under-mounted construction platform for steel-concrete composite beams according to claim 1, characterized in that, The lower operating platform system includes a bottom grid frame and several lower platform top beams (12) located above the bottom grid frame. The bottom space frame is connected to the top beam (12) of the lower platform via the lower platform connecting chord (9).

6. The telescopic and movable under-mounted construction platform for steel-concrete composite beams according to claim 1, characterized in that, The connector consists of several upper and lower platform connecting windows (6), one end of which is connected to the lower operating platform system, and the other end of which is connected to the load-bearing truss system.

7. A telescopic and movable under-mounted construction platform suitable for steel-concrete composite beams according to claim 6, characterized in that, The upper and lower platform connecting window (6) includes an upper horizontal beam (16) of the window and several window string rods (17) set on the upper horizontal beam (16).

8. The telescopic and movable under-mounted construction platform for steel-concrete composite beams according to claim 1, characterized in that, It also includes a series of inclined ladder systems, the upper and lower ends of which are connected to the load-bearing truss system and the lower-hanging operating platform system, respectively. The inclined stair system includes two side handrail assemblies and a number of inclined stair steps (11) located between the two side handrail assemblies. The side handrail assembly includes a sloping ladder beam (10) and a sloping ladder fixing beam (5) disposed on the sloping ladder beam (10), with one end of the sloping ladder fixing beam (5) away from the sloping ladder beam (10) connected to a connector.

9. A telescopic and movable under-mounted construction platform suitable for steel-concrete composite beams according to claim 8, characterized in that, The inclined ladder system is provided with a channel guard ring (18) on the outside, and the top of the channel guard ring (18) is connected to the upper and lower connecting channels (19).

10. A telescopic and movable under-mounted construction platform suitable for steel-concrete composite beams according to claim 1, characterized in that, The mobile walking system also includes anti-tipping blocks (13).

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