Movable telescopic trolley for cantilever work under outer flange of bridge

Abstract

The utility model discloses a movable telescopic trolley for bridge outer wing flange under cantilever operation, and the longitudinal beam is fixed at the top of the vertical rod through the bolt, is provided with the platform walking mechanism that is formed by walking winch mechanism on the longitudinal beam, is provided with winch track on platform walking mechanism, and the lower end of movable winch is provided with lifting hook, installs the guide frame on the upper end of winch track, and platform guide rod piece is longitudinally passed through guide frame, winch track, platform walking mechanism, and construction platform is fixedly connected with platform reinforcing rod piece, and platform reinforcing rod piece is worn on platform guide rod piece, and platform reinforcing rod piece is also connected with lifting chain block that hangs in the lower end of winch track through chain.The construction vehicle uses truss structure, uses walking winch to move the front and back of construction platform, and uses chain block to move the up and down of platform.Combination counterweight balance can transport two construction personnel to the bridge beam surface wing flange under operation, and it is construction platform, and it is personnel transport equipment.

Description

Technical Field

[0001] This utility model relates to the field of bridge outer flange construction, specifically to a mobile telescopic trolley for cantilever operations under the outer flange of a bridge. Background Technology

[0002] In bridge construction and maintenance, painting, inspection, and reinforcement of the cantilever section under the outer flange of a bridge are typical high-altitude, high-risk operations, requiring specialized work platforms for precise delivery of personnel and materials and safe operation. Currently, commonly used equipment in the industry includes traditional cantilever baskets, cantilever work platforms, flange cranes, and simple high-altitude cantilever supports, but these have many shortcomings in practical application. Traditional cantilever hanging baskets are complex in structure and cumbersome to assemble and disassemble. They need to be fixed by anchoring on the bridge deck, which not only easily damages the bridge structure but also poses a risk of overturning. Furthermore, they are inconvenient to move after a single operation and are difficult to adapt to the needs of long-distance continuous construction. Existing cantilever operation platforms often suffer from excessive weight and high steel consumption, resulting in poor economic efficiency. Some equipment lacks reliable walking positioning and braking systems, which can easily lead to safety hazards such as trajectory deviation, slippage and fall. Furthermore, the height and width adjustment flexibility is insufficient, making it difficult to adapt to the structural differences of the outer flanges of different bridges. While specialized flange cranes can meet the lifting requirements of large-tonnage components, their structural compactness is insufficient. They focus on beam erection rather than routine personnel operations, and cannot meet the integrated needs of transporting construction personnel and lifting small materials. Furthermore, the assembly process is complex and the reuse rate is low. Most aerial work platforms lack effective balancing and protective structures, making their center of gravity prone to shift during cantilever operations. They are also susceptible to lateral instability under wind loads or eccentric loads. Furthermore, they lack bottom protection devices, resulting in insufficient safety assurance for personnel.

[0003] As bridge engineering demands increasingly higher levels of efficiency, safety, and economy, there is an urgent need for a bridge cantilever operation device that is simple in structure, easy to move, lightweight to assemble, safe and reliable, and capable of simultaneously transporting personnel and hoisting materials, in order to address many of the pain points of existing technologies. Utility Model Content

[0004] Therefore, to address the aforementioned shortcomings, this utility model provides a movable telescopic trolley for cantilever operations under the outer flange of bridges. Based on the deficiencies of existing cantilever operation equipment under the outer flange of bridges, this technology aims to solve the following core technical problems: To address the issue of poor mobility of existing equipment, this project enables convenient long-distance movement of equipment on the bridge deck, avoiding the tedious process of repeated disassembly and assembly during long-distance construction and improving construction efficiency. To address the issues of insufficient stability and safety in existing equipment, the risk of overturning during high-altitude cantilever operations is eliminated by optimizing the balance structure and protective design, thereby ensuring the safety of construction workers. This solves the problem of the limited functionality of existing equipment, enabling the integration of personnel transportation and material hoisting without the need for additional lifting equipment, thus simplifying the construction process. To address the issues of complex structure, difficult assembly, and poor economic efficiency of existing equipment, a lightweight truss structure is adopted to reduce the equipment's weight, improve assembly convenience and reusability, and control construction costs.

[0005] This utility model is implemented as follows: a mobile telescopic trolley for cantilever operation under the outer flange of a bridge is constructed, characterized by including: a longitudinal beam (8), a vertical rod (14), a platform walking mechanism (7), a construction platform (12), an electric walking system and a counterweight (1). The longitudinal beam (8) is fixed to the top of the vertical rod (14) by bolts, and a diagonal brace A (13) is provided between the vertical rod (14) and the longitudinal beam (8). The platform walking mechanism (7) is provided on the longitudinal beam (8). The platform walking mechanism (7) is composed of a walking winch (3). The platform walking mechanism (7) is provided with two sets of winch tracks (4). A movable winch (24) is installed in the winch track (4). A hook (22) is provided at the lower end of the movable winch (24). The upper end of the winch track (4) is equipped with a guide frame (6), the platform guide rod (5) passes longitudinally through the guide frame (6), the two sets of winch tracks (4) and the platform walking mechanism (7), and the lower end of the platform guide rod (5) is connected to the construction platform (12). The construction platform (12) is fixedly connected to the platform reinforcing rod (11), the platform reinforcing rod (11) is sleeved on the platform guide rod (5), and the platform reinforcing rod (11) is connected to the lifting chain trolley (20) suspended at the lower end of the winch track (4) by a chain. A counterweight (1) is suspended at one end of the longitudinal beam (8); The lower end of the vertical rod (14) is connected to the electric walking system, which includes a braking system (16), a chassis (17), wheels (18) and a power supply (19). A diagonal brace B (15) is provided between the vertical rod (14) and the chassis (17). The construction platform (12) is fixed with a platform bottom support member (21) at its lower end, and the platform bottom support member (21) is fixedly connected to the platform reinforcing member (11).

[0006] According to the movable telescopic trolley of this utility model, the longitudinal beam (8), vertical rod (14), platform reinforcing rod (11) and construction platform (12) all adopt a truss structure.

[0007] According to the present invention, the mobile telescopic trolley is used to drive the construction platform (12) to move back and forth along the longitudinal beam (8), and the lifting chain trolley (20) is used to drive the construction platform (12) to move up and down along the platform guide rod (5).

[0008] According to the movable telescopic trolley of this utility model, the weight of the counterweight (1) matches the total weight of the construction platform (12) and the rated load, and is used to balance the overall center of gravity of the equipment.

[0009] According to the movable telescopic trolley of this utility model, the platform guide rod (5) has 4 rods, which are symmetrically distributed and are fitted with the guide frame (6) with a gap to ensure the smoothness of lifting.

[0010] According to the movable telescopic trolley of this utility model, the platform bottom support rod (21) has a grid structure that completely covers the area below the construction platform (12).

[0011] According to the present invention, the power source (19) of the electric walking system is a lithium battery pack, and the braking system (16) is an electromagnetic braking device.

[0012] According to the movable telescopic trolley of this utility model, the two sets of winch tracks (4) are arranged in parallel, and limit blocks are provided at both ends of the tracks.

[0013] This utility model has the following advantages: Through structural optimization and functional integration, this mobile telescopic trolley has the following core beneficial effects compared with the prior art: First, relying on the electric walking system and braking device, it can move conveniently over long distances on the bridge surface without repeated disassembly and assembly; the walking winch and the lifting chain pulley work together to enable the construction platform to be precisely adjusted forward and backward and up and down to meet the cantilever operation needs of different positions.

[0014] Secondly, the use of counterweights and diagonal bracing structures to form a dual balance effectively avoids the risk of overturning during high-altitude cantilever operations; the construction platform is equipped with bottom support rods to form a fully enclosed protection, which, together with the positioning function of the guide frame and guide rods, ensures the smooth and safe operation of personnel and reduces the risk of falling.

[0015] Third, it combines personnel transportation and material hoisting functions. Construction materials can be directly hoisted to the work platform using a mobile winch, eliminating the need for additional lifting equipment, simplifying the construction process and reducing equipment investment.

[0016] Fourth, the structure is economical and highly reusable: it adopts a truss structure design, the overall components are lightweight, easy to assemble and disassemble, and the transportation cost is low; the core components adopt a standardized design, which is easy to replace after wear and tear, and can be repeatedly applied to different bridge projects, reducing long-term construction costs. Attached Figure Description

[0017] Figures 1-2 This is an implementation structural diagram of the telescopic trolley of this application.

[0018] The components include: 1. Counterweight block; 2. Movable tie beam (100mm×2mm square steel); 3. Traveling winch; 4. Winch track (slot 14); 5. 9m platform guide rod (100mm×2mm square steel); 6. Guide frame (110mm×2mm square steel); 7. Platform traveling mechanism (combined steel component); 8. Longitudinal beam (I-20b); 9. Front limit switch; 10. Movable tie beam (100mm×2mm square steel); 11. Platform reinforcing rod (150mm×3.5mm square steel); 12. Construction platform (25mm×2mm square steel); 13. Diagonal brace (slot 12). A13, Vertical rod (I36b) 14, Diagonal brace (groove 12) B15, Braking system 16, Chassis (I16b) 17, Wheels 18, Power supply 19, Lifting chain trolley 20, Platform bottom support rod (double groove 10) 21, Hook 22, Movable winch 24. Detailed Implementation

[0019] The following will be combined with the appendix Figures 1-2 This utility model will be described in detail, and the technical solutions in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0020] This utility model provides, through improvements, a movable telescopic trolley for cantilever operations under the outer flange of bridges, such as... Figures 1-2As shown, it can be implemented as follows: The longitudinal beam 8 is fixed to the top of the vertical rod 14 by bolts. A platform traveling mechanism 7 consisting of a traveling winch 3 is installed on the longitudinal beam 8. Two sets of winch tracks 4 are installed on the platform traveling mechanism 7. A movable winch 24 is installed in the winch track 4. A hook 22 is installed at the lower end of the movable winch 24. A guide frame 6 is installed at the upper end of the winch track 4. The platform guide rod 5 is longitudinally passed through the guide frame 6, the two sets of winch tracks 4, and the platform traveling mechanism 7. Then, a construction platform 12 is installed at the lower end of the platform guide rod 5. The construction platform 12 and the platform reinforcing rod are connected. The platform is fixedly connected to component 11. The platform reinforcing rod 11 is sleeved on the platform guide rod 5. The platform reinforcing rod 11 is also connected to the lifting chain trolley 20 suspended at the lower end of the winch track 4 via a chain. The construction platform is moved forward and backward using a traveling winch, and moved up and down using the chain trolley. A counterweight 1 is suspended at one end of the longitudinal beam 8. A diagonal brace A13 is also installed between the vertical rod 14 and the longitudinal beam 8. The lower end of the vertical rod 14 is an electric travel system, which consists of a braking system 16, a chassis 17, wheels 18, and a power supply 19. A diagonal brace B15 is also installed between the vertical rod 14 and the chassis 17. The lower end of the construction platform 12 is also fixed with a platform bottom support rod 21, which is fixed to the platform reinforcing rod 11.

[0021] This construction vehicle utilizes a truss structure, employing a traveling winch for forward and backward movement of the construction platform and a chain pulley for vertical movement. With the aid of counterweights for balance, it can transport two construction workers to the area under the bridge beam flange for work, serving as both a construction platform and personnel transport equipment. A mobile winch can be used to transport construction materials to the platform for installation. This device is highly mobile, facilitating long-distance construction; its lightweight components facilitate assembly; it ensures a safe working environment for personnel moving from the beam surface to the work site; and finally, its simple structure, economical operation, and high reusability.

[0022] The specific implementation process of this patent is described below; (a) Assembly and Implementation Steps Electric walking system assembly: Select a chassis 17 with a load capacity of ≥500kg, fix 4 sets of wheels 18 to the four corners of the bottom of the chassis 17 with axle pins, install the braking system 16 (electromagnetic braking device) at the drive shaft of the wheels 18, and fix the power supply 19 (lithium battery pack, capacity ≥200Ah) in the middle of the chassis 17 to complete the basic assembly of the electric walking system.

[0023] Vertical rod and diagonal brace fixing: Two vertical rods 14 are vertically welded to both ends of the chassis 17, and diagonal brace B15 is welded between the vertical rods 14 and the chassis 17 to enhance the stability of the vertical support.

[0024] Longitudinal beam installation: Fix the longitudinal beam 8 to the top of the two vertical rods 14 with M24 high-strength bolts. A suspension point is reserved at one end of the longitudinal beam 8 (the side away from the construction platform) for installing the counterweight 1.

[0025] Balanced structure assembly: Based on the construction platform 12 and rated load (2 construction workers + tools and materials, total load ≤200kg), select a counterweight block 1 of 300-400kg and suspend it from the reserved suspension point on the longitudinal beam 8 by steel wire rope to ensure the overall center of gravity of the equipment is balanced.

[0026] Platform walking mechanism installation: Fix the platform walking mechanism 7 (including the walking winch 3, power 1.5kW) to the longitudinal beam 8 with bolts. Install two sets of parallel winch rails 4 (length 1.5-2m, rail spacing 500mm) on the top of the platform walking mechanism 7, and install limit blocks at both ends of the rails.

[0027] Assembly of guiding and lifting components: Weld a guide frame 6 (with an inner diameter slightly larger than the diameter of the platform guide rod 5) to the upper end of the winch track 4. Pass four platform guide rods 5 (diameter 30mm, length 4-6m) longitudinally through the guide frame 6, the winch track 4 and the platform traveling mechanism 7, ensuring that the verticality deviation of the rods is ≤2‰. Suspend a lifting chain trolley 20 (rated load ≥300kg) at the lower end of the winch track 4 and connect it to the platform reinforcing rod 11 through a chain.

[0028] Construction platform assembly: The construction platform 12 is welded and fixed to the platform reinforcing rod 11, and the platform reinforcing rod 11 is sleeved on the lower end of the platform guide rod 5; the platform bottom support rod 21 is welded to the lower end of the construction platform 12, and the bottom support rod is welded and reinforced with the platform reinforcing rod 11 to form a fully enclosed protection.

[0029] Material transport system assembly: Install movable winches 24 (power 2kW, rated load ≥100kg) in the two sets of winch tracks 4 respectively, and install hooks 22 at the lower end of the movable winches 24 to ensure that the lifting stroke of the hooks covers the working height range of the construction platform.

[0030] Overall commissioning: Check the tightening torque of all bolts (M24 bolt tightening torque ≥300N・m), the strength of welded joints, test the walking and braking functions of the electric walking system, and adjust the forward and backward movement of the walking winch 3 (≤1.5m) and the lifting accuracy of the lifting chain trolley 20 (error ≤50mm) to ensure coordinated operation of all components.

[0031] (II) Implementation Steps Equipment relocation: Start the equipment via the power supply 19 of the electric walking system, operate the walking button to move the trolley to the working area on the outer flange of the bridge, and activate the braking system 16 to lock the wheels 18 to prevent the equipment from sliding.

[0032] Construction platform positioning: Operate the lifting chain trolley 20, and drive the platform reinforcing rod 11 and construction platform 12 to move downward along the platform guide rod 5 through the chain until the construction platform 12 reaches the cantilever operation point under the outer flange of the bridge, and lock the chain trolley.

[0033] Personnel and material transportation: Two construction workers climb onto the construction platform 12 via the beam surface and fasten their safety ropes; they use the hook 22 of the movable winch 24 to hoist construction materials (such as paint, fasteners, and small tools), and operate the winch to transport the materials to the construction platform 12, thus completing the work preparation.

[0034] Work adjustment: If the work position needs to be adjusted, start the traveling winch 3 to drive the platform traveling mechanism 7 and the construction platform 12 to move back and forth along the longitudinal beam 8 until the target work point is reached, and then lock the traveling mechanism again.

[0035] Work completed: After the construction is completed, the remaining materials are first hoisted to the beam surface by the mobile winch 24, and then the lifting chain trolley 20 is operated to raise the construction platform 12 to the height of the beam surface. The construction personnel leave the platform, release the braking system 16, and move the equipment to the designated storage area.

[0036] The following explains the value of this application; this device meets the actual needs of cantilever operations under the outer flange of bridges, and its value is reflected in multiple dimensions: Improved construction efficiency: It solves the problems of inconvenient movement and cumbersome disassembly and assembly of traditional equipment. There is no need to repeatedly build work platforms during long-distance construction. Personnel and materials are transported efficiently and directly, greatly shortening the construction cycle.

[0037] Reduced construction costs: Lightweight structures reduce material consumption and transportation costs, standardized components increase reusability, and there is no need for additional lifting and transportation equipment, thus reducing equipment purchase and maintenance costs; at the same time, it reduces the number of construction personnel and lowers labor costs.

[0038] It is suitable for a wide range of scenarios: it can meet the needs of painting, maintenance and reinforcement of the cantilever under the outer flange of bridges with different spans and structural forms. It is especially suitable for long-distance continuous operation scenarios and has strong versatility.

[0039] Ensuring operational safety and compliance: The comprehensive balanced structure and protective design meet the safety standards for high-altitude work machinery, effectively reducing the accident rate and avoiding project delays and economic losses caused by safety issues.

[0040] Reduced operational difficulty: No anchoring work is required on the bridge structure, avoiding damage to the main bridge structure; the platform adjustment and operation are simple, and construction personnel can get started without complicated training, lowering the operational threshold.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mobile telescopic trolley for cantilever operations under the outer flange of a bridge, characterized in that: Includes longitudinal beams (8), vertical rods (14), platform walking mechanism (7), construction platform (12), electric walking system and counterweight (1); The longitudinal beam (8) is fixed to the top of the vertical rod (14) by bolts, and a diagonal brace A (13) is provided between the vertical rod (14) and the longitudinal beam (8). The platform walking mechanism (7) is provided on the longitudinal beam (8). The platform walking mechanism (7) is composed of a walking winch (3). The platform walking mechanism (7) is provided with two sets of winch tracks (4). A movable winch (24) is installed in the winch track (4). A hook (22) is provided at the lower end of the movable winch (24). The upper end of the winch track (4) is equipped with a guide frame (6), the platform guide rod (5) passes longitudinally through the guide frame (6), the two sets of winch tracks (4) and the platform walking mechanism (7), and the lower end of the platform guide rod (5) is connected to the construction platform (12). The construction platform (12) is fixedly connected to the platform reinforcing rod (11), the platform reinforcing rod (11) is sleeved on the platform guide rod (5), and the platform reinforcing rod (11) is connected to the lifting chain trolley (20) suspended at the lower end of the winch track (4) by a chain. A counterweight (1) is suspended at one end of the longitudinal beam (8); The lower end of the vertical rod (14) is connected to the electric walking system, which includes a braking system (16), a chassis (17), wheels (18) and a power supply (19). A diagonal brace B (15) is provided between the vertical rod (14) and the chassis (17). The construction platform (12) is fixed with a platform bottom support member (21) at its lower end, and the platform bottom support member (21) is fixedly connected to the platform reinforcing member (11).

2. The movable telescopic trolley according to claim 1, characterized in that: The longitudinal beam (8), vertical rod (14), platform reinforcing rod (11), and construction platform (12) all adopt a truss structure.

3. The movable telescopic trolley according to claim 1, characterized in that: The traveling winch (3) is used to drive the construction platform (12) to move back and forth along the longitudinal beam (8), and the lifting chain trolley (20) is used to drive the construction platform (12) to move up and down along the platform guide rod (5).

4. The movable telescopic trolley according to claim 1, characterized in that: The weight of the counterweight (1) is matched with the total weight of the construction platform (12) and the rated load, and is used to balance the overall center of gravity of the equipment.

5. The movable telescopic trolley according to claim 1, characterized in that: The platform guide rod (5) has 4 rods, which are symmetrically distributed and are fitted with the guide frame (6) with a gap to ensure the smoothness of lifting.

6. The movable telescopic trolley according to claim 1, characterized in that: The platform bottom support member (21) has a grid structure that completely covers the area below the construction platform (12).

7. The movable telescopic trolley according to claim 1, characterized in that: The power source (19) of the electric walking system is a lithium battery pack, and the braking system (16) is an electromagnetic braking device.

8. The movable telescopic trolley according to claim 1, characterized in that: The two sets of winch tracks (4) are arranged in parallel, and limit blocks are provided at both ends of the tracks.

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