Quickly spliced bailey frame portal position limiter

Abstract

The utility model discloses a kind of bailey door type limiters of quick splicing, it includes limit ware shell, the inside of limit ware shell is provided with support arm, the outside fixed connection of support arm has buckle, the outside sliding connection of support arm has movable clamping plate, the top of support arm is provided with lower limit frame, the top of lower limit frame is provided with upper limit frame. Through the above structure, by fixing through mechanical arm, limit shell is pushed into along the top of mechanical arm, buckle moves through compression spring, when mechanical arm enters, quick fixing is realized through spring reset self-locking, handle can drive quick disassembly plate to drive limit disc to realize quick disassembly, greatly improve construction and recovery efficiency, adapt to emergency demand, enhance construction flexibility, reduce component loss, quick disassembly can quickly release limit, without destroying limit ware or bailey frame body, it can be spliced after adjustment.

Description

Technical Field

[0001] This utility model relates to the technical field of Bailey bridge gantry limiters that can be quickly assembled, and particularly to a Bailey bridge gantry limiter that can be quickly assembled. Background Technology

[0002] Bailey bridges, as one of the most widely used and popular bridge types in the world today, owe their core advantages to modular design and standardized production. These bridges are not only simple in structure, with fewer components and lighter weight, making transportation and disassembly extremely convenient, but also allow for rapid erection and disassembly, significantly improving construction efficiency in emergency rescue, temporary passage, and military engineering scenarios. Furthermore, Bailey bridges possess excellent load-bearing capacity, high structural rigidity, and outstanding fatigue resistance, enabling them to adapt to different spans and usage requirements. They can be flexibly combined into various bridge types, including temporary bridges, emergency bridges, and even permanent bridges, balancing cost control with safety and adaptability, thus gaining widespread application globally.

[0003] However, in the actual erection of Bailey bridges, the traditional connection methods between the Bailey truss and the bottom load-bearing beam still have certain limitations. Currently, the mainstream practice is to use concrete pouring or on-site welding for fixing. In particular, welded connections are usually for single use, which not only makes disassembly and assembly difficult and hard to reuse, but also significantly increases construction costs and time. In addition, when dealing with load-bearing beams of different specifications of I-beams or H-beams, traditional steel plates often need to be customized for each cross-sectional size and thickness. This increases the complexity and cost of the initial design and procurement, and also easily leads to on-site installation failures due to mismatched component specifications, affecting the overall progress and economy of the project. Utility Model Content

[0004] The purpose of this utility model is to significantly improve construction and recycling efficiency, adapt to emergency needs, enhance construction flexibility, reduce component wear, and provide a quick-assembly Bailey bridge gantry limiter. This solves the problems of the mainstream connection methods between traditional Bailey bridges and bottom load-bearing beams, which are mostly single-use, costly, and cannot be disassembled for reuse. These connection methods have long installation cycles and cannot meet the needs of efficient construction. For I-beams of different thicknesses, clamps need to be customized separately, increasing design and procurement costs.

[0005] This utility model also provides a Bailey bridge gantry-type limiter with the above-mentioned quick-assembly capability, including a limiter housing, a support arm disposed inside the limiter housing, and a buckle fixedly connected to the outside of the support arm. The buckle is configured to achieve self-locking fixation when the limiter housing is pushed in along the top of the Bailey bridge mechanical arm. A movable clamp is slidably connected to the outside of the support arm. The movable clamp is configured to adapt to and clamp load-bearing beams of different thicknesses through its sliding displacement. A lower limit frame is disposed above the support arm, and an upper limit frame is disposed above the lower limit frame. The upper limit frame and the lower limit frame are mechanically connected and configured to adapt to different models of Bailey bridges by adjusting their relative positions. This invention enables rapid installation and precise positioning between the Bailey bridge and the load-bearing beam, while also possessing wide adaptability. The design allows for quick fixation without the need for complex tools or welding; the movable clamp can accommodate load-bearing beams of different thicknesses, and the upper and lower limiting frames can be adjusted to adapt to different models of Bailey bridges. This effectively solves the core pain points of low efficiency and poor versatility of traditional connection methods, significantly improving construction efficiency and component reuse rate.

[0006] According to the present invention, a quick-assembly Bailey frame gantry-type limiter includes a compression rod externally fixed to the buckle, and a limit disc externally fixed to the compression rod. This design, through the specific connection between the compression rod and the limit disc, provides a stable and reliable transmission structure for the buckle's self-locking function, transforming the buckle's locking action into a stable linear motion. This ensures the smoothness and consistency of the self-locking process, improves the mechanical strength and reliability during fixing, and lays the structural foundation for subsequent quick disassembly.

[0007] According to the present invention, a quick-assembly Bailey frame gate-type limiter includes a compression spring sleeved on the outside of the compression rod and a quick-release plate on the outside of the limiting disc. By adding a compression spring sleeved on the outside of the compression rod, the self-locking mechanism gains automatic reset capability. The spring force assists in the locking process, ensuring the latch maintains a stable locked state when not interfered with by external force, while also providing the necessary reverse force for unlocking. This makes the entire locking and unlocking process smoother and more automatic, enhancing operational convenience and the overall reliability of the mechanism.

[0008] According to the present invention, a quick-assembly Bailey gantry-type limiter is provided, wherein a handle is fixedly connected to the outside of the quick-release plate. By fixing the handle to the quick-release plate, a direct and labor-saving manual operation point is provided for the operator, transforming the movement of the internal mechanism into a simple manual action. This eliminates the need for special tools during disassembly, truly achieving "one-click" quick unlocking and improving the convenience and efficiency of on-site operation in the field or in emergency situations.

[0009] According to this utility model, a quick-assembly Bailey bridge gantry-type limiter is provided, wherein the external thread of the movable clamping plate is connected to a limit bolt, and the external thread of the limit bolt is connected to a limit nut. This utility model controls the movable clamping plate through the threaded connection of the limit bolt and the limit nut, providing a simple, reliable, and infinitely adjustable clamping method. The clamping force of the clamping plate on the load-bearing beam can be precisely controlled by rotating the bolt, ensuring the firmness of the connection. Simultaneously, this threaded pair structure has good self-locking properties and can effectively prevent loosening even in vibration environments, ensuring safety and reliability.

[0010] According to the present invention, a quick-assembly gantry-type limiter for Bailey bridges includes a fixed bracket externally connected to the outer shell of the limiter, and a movable rod externally connected to the fixed bracket. This design forms a stable gantry frame structure, effectively dispersing stress during the load-bearing process. Simultaneously, the movable rod provides a mounting base and position adjustment space for the upper limiter frame, offering structural support for flexible adaptation to different Bailey bridge sizes and enhancing the overall structural rigidity and adaptability of the limiter.

[0011] According to the present invention, a quick-assembly gantry-type limiter for a Bailey bridge includes an upper limit bracket mounted above the movable rod, with a fixing bolt externally threaded onto the upper limit bracket. This provides a robust and detachable mechanical connection method. Once adjusted to the correct position, tightening the fixing bolt securely locks the upper limit bracket onto the movable rod, forming a stable rigid support that effectively limits the vertical and lateral displacement of the Bailey bridge, ensuring the stability and safety of the overall structure.

[0012] According to the present invention, a quick-assembly Bailey bridge gantry limiter is provided, wherein the external thread of the fixing bolt is connected to a lower limit frame, and the external thread of the lower limit frame is connected to a fixing nut. This invention, through the cooperation of the fixing bolt and the fixing nut, tightly connects the lower limit frame and the upper limit frame into a whole, completing the final assembly and locking of the entire limit frame module. This double-nut or bolt-nut fixing method has a simple structure, high locking force, and can withstand frequent disassembly and assembly without easily being damaged, ensuring the durability and reliability of the entire gantry limiter under long-term use and repeated disassembly and assembly.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. One of the core advantages of this technical solution is the realization of rapid assembly / disassembly and efficient recycling of Bailey bridges. Specifically, during installation, simply push the limiting shell along the top of the robotic arm, and the built-in buckle will automatically lock, completing a secure fixation; the operation is extremely quick. During disassembly, rotating the handle drives the limiting disc, instantly releasing the self-locking mechanism for "one-click" rapid separation. This efficient assembly / disassembly mechanism improves the efficiency of construction deployment and on-site recovery, making it particularly suitable for scenarios with extremely high time requirements, such as emergency rescue and temporary bridges. Furthermore, since the assembly / disassembly process does not require welding, cutting, or violent damage, it not only ensures the flexibility of construction but also fundamentally avoids damage to the limiting device and the Bailey bridge itself, achieving non-destructive recycling and multiple reuses of components, significantly reducing the cost per use.

[0014] 2. Another significant benefit of this solution lies in its excellent dimensional adaptability and installation flexibility. Its innovative use of movable clamping plates allows for the secure clamping of load-bearing beams such as I-beams and H-beams of varying thicknesses, effectively solving the problem of requiring customized clamps due to changes in beam height in traditional methods. Furthermore, through the mechanical combination of the lower and upper limit frames and by adjusting the position of the movable rod, this limiter can easily adapt to various models of Bailey bridges. This "modular splicing, stepless adjustment" design concept gives a single limiter wide applicability, allowing for flexible adjustment of the limit position and easily covering most common Bailey bridge and load-bearing beam specifications. This not only avoids compatibility issues and increased procurement costs caused by differences in component models but also greatly simplifies on-site inventory management and installation processes, improving the adaptability and economy of the entire construction system. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a structural diagram of a Bailey bridge gantry limiter that can be quickly assembled according to this utility model; Figure 2 This is an internal cross-sectional view and structural diagram of a Bailey gantry limiter that can be quickly assembled according to this utility model. Figure 3 This is a structural diagram of a fixing device for a Bailey bridge gantry limiter that can be quickly assembled according to this utility model; Figure 4 This is a structural diagram of a limit device for a Bailey gantry limiter that can be quickly assembled according to this utility model.

[0016] Legend: 1. Limiter housing; 2. Support arm; 3. Buckle; 4. Compression spring; 5. Compression rod; 6. Limiting disc; 7. Quick release plate; 8. Handle; 9. Movable clamp; 10. Limiting bolt; 11. Limiting nut; 12. Fixed bracket; 13. Movable rod; 14. Upper limit bracket; 15. Fixed bolt; 16. Lower limit bracket; 17. Fixed nut. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] like Figures 1-4 As shown, this utility model discloses a quick-assembly gantry-type limiter for a Bailey bridge. Its core structure includes a limiter housing 1, inside which is a support arm 2 that provides primary support. A key self-locking component—a latch 3—is fixedly connected to the outside of the support arm 2. This latch 3 is specially designed to automatically lock when the entire limiter housing 1 is pushed in along the top of the Bailey bridge's mechanical arm, achieving rapid fixation. To achieve broad adaptability to load-bearing beams of varying thicknesses, a set of movable clamping plates 9 is also slidably connected to the outside of the support arm 2. These movable clamping plates 9 can flexibly adjust the clamping space through their own sliding displacement, thereby securely clamping a series of load-bearing beams from thin to thick. Above the support arm 2, a gantry frame composed of a lower limiter 16 and an upper limiter 14 is provided. The upper and lower limiter frames are reliably connected mechanically, together forming the main structure that restricts the vertical displacement of the Bailey bridge.

[0019] To ensure convenient and quick fastening and disassembly, a compression rod 5 is fixedly connected to the outside of the buckle 3, and a limiting disc 6 is fixedly connected to the end of the compression rod 5. A compression spring 4, providing continuous elastic force, is fitted around the outside of the compression rod 5; this spring is key to achieving the self-locking and reset functions of the buckle 3. A quick-release plate 7 is provided outside the limiting disc 6, and a handle 8 for the operator to apply force directly is fixedly connected to the outside of the quick-release plate 7. This series of linked components together constitutes an efficient operating mechanism: pressing down the handle 8 compresses the limiting disc 6 and the compression spring 4 through the quick-release plate 7, causing the compression rod 5 to release the self-locking of the buckle 3, thus achieving quick and non-destructive disassembly of the limiter.

[0020] Regarding clamping adjustment, the movable clamping plate 9 is externally threaded with a limit bolt 10. By rotating this bolt, the movable clamping plate 9 can be precisely driven to slide. The limit bolt 10 is further threaded with a limit nut 11. After the clamping plate position is adjusted to the correct position, tightening the limit nut 11 can effectively prevent the bolt from loosening during vibration, ensuring a firm and reliable clamping.

[0021] In terms of the overall frame connection, a fixed bracket 12 is fixedly connected to the exterior of the limiter housing 1. This bracket serves as the base of the upper structure, and an adjustable movable rod 13 is further fixedly connected to its exterior. An upper limit frame 14 is positioned above the movable rod 13, and the two are connected and fixed by a fixing bolt 15 threaded to the exterior of the upper limit frame 14. This fixing bolt 15 also extends downwards to thread with the lower limit frame 16, and is finally locked by a fixing nut 17 threaded to the exterior of the lower limit frame 16. This multi-layered threaded fastening method ensures that the entire portal limit frame has extremely high structural rigidity and stability when bearing loads.

[0022] Working principle: Step 1: Fixing to the load-bearing beam: During installation, first position the left support arm 2 of the limiter at the predetermined end of the load-bearing beam (such as an I-beam or H-section). By rotating the limit bolt 10, drive the threaded movable clamp 9 to slide inward along the support arm 2 until the movable clamp 9 is tightly fitted against the web or flange of the load-bearing beam. Then, tighten the limit nut 11 to securely lock it onto the limit bolt 10, preventing loosening under vibration. This adjustment mechanism allows the clamping distance of the movable clamp 9 to be flexibly varied, thus safely and stably adapting to and fixing load-bearing beams of different thicknesses.

[0023] Step 2: Locking the Bailey Frame Robotic Arm: After securing the robotic arm to the load-bearing beam, push the limiter housing 1 along the top of the Bailey frame robotic arm. During this process, the built-in latch 3 automatically triggers mechanical self-locking under the preload of the compression spring 4, achieving an instantaneous rigid connection between the limiter and the robotic arm without any additional tools or welding. After this side is installed, the same procedure is followed on the other side: first, push the limiter housing 1 into the robotic arm and complete the self-locking, then use its own movable clamp 9 and limit bolt 10 to fix the support arm 2 to the load-bearing beam on the other side.

[0024] Step 3: Vertical Limiting and Final Fixing: Finally, securely place the members or parts of the Bailey bridge that need to be constrained within the limiting space formed by the upper limit frame 14 and the lower limit frame 16. Tighten the fixing bolts 15 to press the upper limit frame 14, the lower limit frame 16, and the intermediate movable rod 13 into a sturdy overall frame. Finally, tighten the fixing nuts 17 on the lower limit frame 16 to complete the final anti-loosening lock of all threaded connections. This portal structure effectively limits the vertical displacement and lateral sway of the Bailey bridge, thereby ensuring the stability and safety of the entire connection node.

[0025] Example 1: This embodiment demonstrates the installation and positioning process of the limiter on a common standard I-beam load-bearing beam. First, the operator places the left support arm 2 of the limiter at the end of the intended I-beam. Then, the operator rotates the limit bolts 10 on both sides, driving the movable clamps 9 on both sides to slide inwards synchronously along the support arm 2 until the movable clamps 9 are tightly fitted against the web of the I-beam. Next, the limit nut 11 is tightened onto the limit bolt 10, utilizing the self-locking characteristic of the thread to prevent loosening, thus firmly clamping the entire limiter onto the load-bearing beam. After the bottom is fixed, the limiter housing 1 is pushed in along the top of the Bailey bridge's robotic arm. During this process, the latch 3 automatically rebounds under the action of the compression spring 4, achieving mechanical self-locking and completing the quick connection between the limiter and one side of the Bailey bridge. Subsequently, the exact same process is repeated on the other side of the Bailey bridge to complete the installation of the second limiter. Finally, the chords or beams of the Bailey bridge that need to be constrained are placed in the cavity between the installed upper limit frame 14 and lower limit frame 16. By tightening the fixing bolts 15 and finally locking the fixing nuts 17 on the lower limit frame 16, the upper and lower limit frames form a rigid "gate" structure, thereby effectively restricting the vertical displacement of the Bailey bridge and completing the entire installation work.

[0026] Example 2: This embodiment highlights the excellent adaptability and flexibility of the limiter when dealing with non-standard H-beam load-bearing beams with significant thickness. Since the flange thickness of the H-beam is significantly greater than that of ordinary I-beams, traditional fixing plates are unsuitable. The operator first positions the limiter, then simply unscrews the limit bolt 10 significantly, increasing the sliding stroke of the movable clamp 9 on the support arm 2, thereby obtaining a larger opening space. After the movable clamp 9 is adjusted to accommodate the thickened H-beam flange, it is clamped in the predetermined position and the limit nut 11 is locked. This process requires no replacement of any parts and can be completed with simple thread adjustments, fully demonstrating the design's adaptability to non-standard components. The subsequent fastening and self-locking process with the Bailey bridge robotic arm is the same as in Example 1. When the upper and lower limit frames are finally fixed, the positions of the rods may also be different due to the possible changes in the Bailey bridge model. At this time, the relative positions of the movable rod 13 and the upper and lower limit frames 16 and 14 can be finely adjusted to ensure that the limit frames can be accurately locked on the outside of the Bailey bridge chord, thereby achieving effective full-range limiting. All of these adjustments can be completed quickly on site without the need for custom parts, thus solving the on-site installation problem caused by inconsistent component specifications.

[0027] In summary, this utility model provides an innovative Bailey bridge gantry-type limiter, whose core value lies in completely revolutionizing traditional fixing methods. This device, through a clever mechanical structure, integrates rapid self-locking, non-destructive one-button disassembly, and adaptive adjustment functions, achieving instantaneous engagement and non-destructive separation with the Bailey bridge robotic arm. Simultaneously, its movable clamping mechanism can flexibly adapt to load-bearing beams of different thicknesses. Furthermore, its modular upper and lower limit frame design allows for easy adjustment to accommodate various Bailey bridge models, ultimately forming an efficient, reliable, and universal connection solution. This not only improves construction efficiency in emergency rescue and temporary projects but also significantly reduces overall costs through component recycling, demonstrating excellent practicality and economy.

[0028] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A Bailey gantry-type limiter that can be quickly assembled, comprising a limiter housing (1), characterized in that, The limiter housing (1) is provided with a support arm (2) inside. The support arm (2) is fixedly connected to a buckle (3) on the outside. The buckle (3) is configured to achieve self-locking when the limiter housing (1) is pushed in along the top of the Bailey frame robotic arm. The support arm (2) is slidably connected to a movable clamp (9). The movable clamp (9) is configured to adapt to and clamp load-bearing beams of different thicknesses by sliding displacement. A lower limit frame (16) is provided above the support arm (2). An upper limit frame (14) is provided above the lower limit frame (16). The upper limit frame (14) and the lower limit frame (16) are mechanically connected.

2. The Bailey gantry-type limit switch that can be quickly assembled according to claim 1, characterized in that, The buckle (3) is externally fixedly connected to a compression rod (5), and the compression rod (5) is externally fixedly connected to a limiting disc (6).

3. A Bailey gantry-type limiter that can be quickly assembled according to claim 2, characterized in that, The compression rod (5) is fitted with a compression spring (4), and the limiting disc (6) is fitted with a quick-release plate (7).

4. A Bailey gantry-type limit switch that can be quickly assembled according to claim 3, characterized in that, The quick-release plate (7) has a handle (8) as an external fixed connection.

5. A Bailey gantry-type limiter that can be quickly assembled according to claim 1, characterized in that, The movable clamp (9) is externally threaded with a limit bolt (10), and the limit bolt (10) is externally threaded with a limit nut (11).

6. A Bailey gantry-type limit switch that can be quickly assembled according to claim 1, characterized in that, The outer casing (1) of the limiter is fixedly connected to a fixed bracket (12), and the fixed bracket (12) is fixedly connected to a movable rod (13).

7. A Bailey gantry-type limit switch that can be quickly assembled according to claim 6, characterized in that, An upper limit bracket (14) is provided above the movable rod (13), and a fixing bolt (15) is threadedly connected to the outside of the upper limit bracket (14).

8. A Bailey gantry-type limiter that can be quickly assembled according to claim 7, characterized in that, The external thread of the fixing bolt (15) is connected to the lower limit bracket (16), and the external thread of the lower limit bracket (16) is connected to the fixing nut (17).

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