A multifunctional mobile protective canopy device

Abstract

This utility model relates to a multifunctional mobile protective canopy device, including support legs, a steel pipe canopy frame, a sliding cover plate, a sliding wheel assembly, and a sealing membrane. During rebar tying, the canopy frame is installed on the rebar tying jig for tying the box girder rebar skeleton. During the tying process, the sliding cover plate on top of the canopy can be adjusted to provide sunshade protection for the operators. After the steel beam is tied, the support legs are fixedly connected to the rebar skeleton. A gantry crane is used to lift the steel pipe canopy, which also serves as a lifting tool, moving the rebar cage to complete the rebar cage installation. After the rebar cage is installed, concrete is poured. During the pouring process, the sliding cover plate can be moved to clear the pouring space, completing the concrete pouring. After the concrete is poured, the sealing membrane is lowered, forming a sealed space for the concrete box girder, creating a closed curing space for the concrete and improving the curing effect. This protective canopy can achieve multiple functions, including rebar tying protection, rebar cage lifting, and sealed concrete curing protection. It is suitable for the prefabrication of large-size concrete box girders, improving construction efficiency and quality.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction, and in particular to a multifunctional mobile protective shed device. Background Technology

[0002] With the rapid advancement of infrastructure construction in my country, the production mode of concrete box girders, as a core component of bridge engineering, has gradually shifted towards centralized prefabrication in factories. Data shows that between 2015 and 2023, the market size of prefabricated concrete box girders in my country grew from approximately 60 billion yuan to 150 billion yuan, with a compound annual growth rate of 20%. The demand in the urban rail transit sector saw an even higher average annual growth rate of 20%. In highway bridge projects, the application rate of prefabricated concrete box girders has exceeded 95%. Centralized prefabrication, with its advantages of stable quality, high production efficiency, and resource conservation, has become the mainstream mode of bridge construction. However, the prefabrication of concrete box girders involves multiple critical processes, including rebar tying, hoisting into the formwork, concrete pouring, and curing. The protective requirements for the working environment vary significantly at each stage, and existing protective facilities are insufficient to meet the high-efficiency, collaborative requirements of intensive production. During the rebar tying stage, traditional fixed protective sheds are limited by their pre-set locations and cannot be flexibly adjusted to adapt to the work surface. In adverse weather conditions such as rain, snow, or high temperatures, insufficient coverage often leads to construction interruptions. Statistics show that the efficiency of rebar tying in open-air environments can fluctuate by more than 30%, and rainwater erosion can cause rebar corrosion, directly affecting structural durability. Furthermore, the erection of protective sheds must strictly adhere to specific plans, and the specifications for pole spacing and crossbar placement conflict with the dynamic work area, further restricting the flexibility of the tying operation. During the installation of the steel reinforcement frame into the formwork, structural interference between the protective facilities and the hoisting equipment is a particularly prominent issue. In existing technologies, while integral protective sheds provide comprehensive shielding, their excessive weight (typically exceeding 5 tons) necessitates the use of large cranes for relocation, increasing foundation reinforcement costs and posing a safety hazard of contact with high-voltage cables. While modular protective sheds reduce hoisting requirements, frequent disassembly and assembly increase the time spent on process connections; according to on-site calculations, each disassembly and assembly operation consumes at least two shifts, significantly reducing prefabrication efficiency. Furthermore, the rigid structural design of traditional protective sheds lacks adaptability to hoisting paths, often requiring the temporary removal of some components, which compromises the integrity of the protection and introduces safety hazards. The concrete pouring and curing stages face a dual conflict between protection and working space. During pouring, the columns and beams of the fixed protective shed can easily obstruct the path of the concrete delivery pipes, forcing construction units to adopt detours or temporary dismantling measures. This affects the continuity of pouring and increases the risk of quality defects such as honeycomb and pitting. In the curing stage, to meet the constant temperature and humidity environment required for steam curing (typically requiring a temperature of 20-25℃ and humidity ≥90% RH), traditional methods require the construction of additional enclosed sheds. This not only results in low material turnover efficiency but also leads to energy waste due to insufficient sealing performance. Data shows that non-integrated curing facilities increase steam energy consumption by approximately 40%, and temperature and humidity fluctuations can easily cause quality problems such as surface cracks in the box girder. Existing protective sheds suffer from inherent defects such as limited functionality and poor versatility. Most facilities are designed for a single process, requiring large-scale modifications or demolition and reconstruction when processes are switched. According to the protective shed erection specifications, each dismantling and assembly requires a specific plan and strict adherence to a top-down dismantling sequence, which is not only time-consuming and labor-intensive but also poses safety risks associated with working at heights. This "one facility per process" model is severely out of step with the current trend of intelligent and green development in prefabrication yards. With the application of BIM technology and the promotion of new materials such as ultra-high performance concrete (UHPC), prefabrication production places higher demands on the dynamic adaptability and functional integration of protective facilities, and traditional protective systems have become a bottleneck restricting the improvement of prefabrication efficiency. Therefore, developing a multifunctional protective device that can adapt to the collaborative needs of multiple processes and has flexible mobility is of great practical significance for addressing the shortcomings of existing protective facilities in terms of spatial adaptability, functional compatibility, and efficiency and economy, and for promoting the further upgrading of concrete box girder prefabrication technology. Utility Model Content

[0003] Based on the shortcomings of the existing technology, the purpose of this utility model is to provide a multifunctional mobile protective shed device for use in the prefabrication of box girders.

[0004] The objective of this utility model can be achieved through the following technical solutions: A multifunctional mobile protective canopy device includes support legs, a steel pipe canopy frame, a sliding cover plate, a set of sliding wheels, and a sealing roll material; the support legs are vertically arranged, the steel pipe canopy frame is set on top of the support legs, and the sliding cover plate is set on top of the steel pipe canopy frame; the sliding wheel set is connected to the bottom of the sliding cover plate, and the sealing roll material is set on both sides of the sliding cover plate.

[0005] Furthermore, the steel pipe shed is composed of arc-shaped steel pipes and horizontal straight steel pipes, wherein the arc-shaped steel pipes are the top load-bearing structure and the horizontal straight steel pipes are the bottom support structure. The two ends of the arc-shaped steel pipes are fixedly connected to the two ends of the horizontal straight steel pipes one by one, forming an overall bow-shaped frame structure.

[0006] Furthermore, several inclined steel pipes are evenly arranged between the arc-shaped steel pipe and the horizontal straight steel pipe. The two ends of each inclined steel pipe are welded and fixed to the middle of the arc-shaped steel pipe and the middle of the horizontal straight steel pipe, respectively. Adjacent inclined steel pipes are connected end to end to form a triangular stable support structure, which enhances the overall load-bearing strength of the steel pipe scaffold.

[0007] Furthermore, the sliding cover plate is slidably mounted on the top of the steel pipe shed via a set of sliding wheels. Specifically, the set of sliding wheels rolls in coordination with the arc-shaped steel pipe of the steel pipe shed, causing the sliding cover plate to slide back and forth along the arc-shaped steel pipe.

[0008] Furthermore, the sliding wheel assembly includes a wheel frame and a wheel body. The wheel frame is detachably connected to the bottom of the sliding cover plate by bolts. The wheel body is rotatably installed inside the wheel frame and is adapted to the outer wall of the arc-shaped steel pipe at the top of the steel pipe scaffold to ensure that the wheel body rolls stably along the arc-shaped steel pipe.

[0009] Furthermore, the internal space of the protective canopy device is a canopy space for accommodating the steel reinforcement frame or concrete box girder; the top of the sealing roll is fixedly connected to the two side edges of the sliding cover plate, and the sealing roll can be lowered and retracted. When the sealing roll is lowered, it hangs down to the bottom of the canopy space, thus closing the canopy space; when the sealing roll is retracted, the canopy space is open. Therefore, by lowering and retracting the sealing roll, the canopy space can be closed and opened, thus controlling the concrete curing environment.

[0010] Furthermore, when the multifunctional mobile protective shed device is used during the rebar tying operation, the support legs are installed on preset fixed points on the rebar tying frame via detachable connectors, achieving stable positioning of the steel pipe shed. The sliding cover plate provides sunshade protection for operators. The rebar tying frame is laid with interlaced horizontal and vertical rebars to form the rebar skeleton. The support legs are installed on the steel frame of the rebar tying frame, avoiding the rebar laying area. After the rebar skeleton is tied, the position of the sliding cover plate is adjusted via the sliding wheel set to reserve operating space for subsequent rebar cage hoisting or concrete pouring processes. During the rebar skeleton tying operation, the sliding cover plate can be pushed to slide to cover the core working area of ​​the rebar tying, thus shielding against external environmental interference.

[0011] Furthermore, after the reinforcing steel cage is tied, the scaffold is raised using lifting equipment and steel wire ropes. The support legs are connected to the top of the reinforcing steel cage, and the steel pipe scaffold is used as a lifting device to lift and install the reinforcing steel cage into the formwork. The arc-shaped steel pipe at the top of the steel pipe scaffold is pre-designed as a lifting point structure for connecting the lifting device's steel wire ropes; the bottom of the support legs is equipped with a detachable fixing structure adapted to the pre-embedded connectors at the top of the reinforcing steel cage; the length and strength of the support legs are adapted to form an integral lifting structure of the reinforcing steel cage and the steel pipe scaffold, so that the steel pipe scaffold can serve as the main body of the lifting device and work together with the reinforcing steel cage to meet the requirements of the formwork jig for installation.

[0012] Furthermore, during the concrete pouring of the box girder, the sliding cover plate is adjusted to create space for the pouring process. After the concrete pouring is completed, the sliding cover plate is adjusted to seal the roll material on both sides, forming a sealed space around the box girder to meet the environmental requirements for steam curing.

[0013] Furthermore, after the reinforcing steel cage is tied, the following steps are taken to hoist the reinforcing steel cage: 1) Using lifting equipment such as a gantry crane, connect one end of the lifting wire rope to the pre-set lifting point of the arc-shaped steel pipe at the top of the steel pipe scaffold; 2) Start the lifting equipment to lift the entire steel pipe scaffold upwards, so that the bottom of the support leg is completely separated from the rebar binding frame; 3) Fix the bottom of the support leg to the pre-embedded connector at the top of the rebar cage with bolts; 4) Using the steel pipe scaffold as the main body of the lifting equipment, lift the entire rebar cage and transfer it to the top of the formwork on the formwork frame. Slowly lower the rebar cage into the formwork to complete the rebar cage installation.

[0014] Furthermore, after the concrete pouring is completed, the following steps are taken to achieve concrete curing: 1) The sliding cover plate is reset to the position covering the top of the concrete box girder using the sliding wheel assembly; 2) The sealing rolls on both sides of the sliding cover plate are lowered so that the bottom end of the sealing roll hangs down to the top of the formwork frame and is sealed; 3) Through the cooperation of the sealing roll and the sliding cover plate, a closed space is formed around and on the top of the concrete box girder. This closed space can meet the constant temperature and humidity requirements for steam curing of the concrete box girder and improve the concrete curing effect.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This application proposes a multi-functional mobile protective shed device that combines the functions of a rebar construction protective shed, a rebar cage hoisting frame, and a concrete curing shed. Using a single mobile multi-functional protective shed, it simultaneously meets the protection requirements for rebar tying, concrete curing, and rebar cage hoisting. In existing technologies, rebar tying requires a separate rebar formwork protective shed, hoisting requires a separate rebar cage hoisting frame, and concrete curing requires a separate curing shed. This patented protective shed can achieve multiple functions, including rebar tying protection, rebar cage hoisting, and airtight concrete curing protection. It is suitable for the prefabrication of large-size concrete box girders, improving construction efficiency and quality. Attached Figure Description

[0016] Figure 1 A schematic diagram of the layout of a multifunctional mobile protective shed device; Figure 2 A schematic diagram of the layout of a multi-functional protective shed device in the state of rebar binding; Figure 3 Schematic diagram of the layout of a multi-functional protective shed device for steel reinforcement hoisting; Figure 4 Schematic diagram of the layout of a multi-functional protective shed for concrete curing; Reference numerals: 1. Support leg; 2. Steel pipe scaffold; 3. Sliding cover plate; 4. Sliding wheel block; 5. Enclosed membrane; 6. Reinforcing cage; 7. Reinforcing bar binding frame; 8. Lifting wire rope; 9. Formwork frame; 10. Concrete box girder. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to specific embodiments. It should be noted that the following embodiments will help those skilled in the art to further understand this utility model, but do not limit this utility model in any way. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model. These all fall within the protection scope of this utility model.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] Example 1: Protective Shelter Device Adapted for Rebar Tying Operations like Figure 1-2 As shown, this embodiment provides a multi-functional mobile protective shed device with a suitable structure for the rebar tying process in the prefabrication of concrete box girders. The specific structural configuration is as follows: The support leg 1 is made of steel square tube (material can be Q235, etc.), and bolt holes are provided at the bottom to match the rebar binding frame 7. This ensures that the support leg 1 does not wobble after being connected to the rebar binding frame 7, meeting the stability requirements during rebar binding. At the same time, the installation position of the support leg 1 avoids the area where the horizontal and vertical rebars are laid on the frame 7.

[0020] The steel pipe shed 2 includes horizontal straight steel pipes and arc-shaped steel pipes, both of which have the same specifications; the ends of the arc-shaped steel pipes and the horizontal straight steel pipes are fixed by full welding to form an arched frame; 18 diagonal steel pipes are evenly welded between the two, and the ends are connected to form a triangular stable structure to meet the weight requirements of the sliding cover and operators.

[0021] The sliding cover plate 3 adopts a composite structure of color steel plate and light steel keel, and the coverage area is perfectly matched with the core operation area of ​​rebar binding; the sliding wheel group 4 is set with 4 groups, each group includes 2 wheels and 1 wheel frame (steel). The wheel frame is detachably connected to the keel at the bottom of the sliding cover plate 3 by bolts; the wheels fit tightly against the outer wall of the arc-shaped steel pipe, which can push the sliding cover plate 3 to slide back and forth along the arc-shaped steel pipe to achieve sunshade and rain protection for different binding areas.

[0022] The closed roll material 5 is made of PVC waterproof cloth, which is suitable for the height of the support legs. The top is fixed to the two sides of the sliding cover plate 3 by rivets. When it is retracted, it can be rolled up on the roller on the side of the sliding cover plate 3 (the roller is rotatably connected to the cover plate keel), without occupying the space for steel bar binding.

[0023] Example 2: Reinforcing cage hoisting adaptable protective shed device like Figure 3 As shown, this embodiment focuses on optimizing the hoisting adaptation structure of the device for the process of hoisting and placing the steel reinforcement cage into the formwork. The specific configuration is as follows: Several suspension points are pre-set on the arc-shaped steel pipe at the top of the steel pipe scaffold 2. If multiple suspension points are set, the positions of the suspension points are symmetrically distributed, and the lifting lugs are fully welded to the arc-shaped steel pipe for fixation.

[0024] Two positioning pin holes are added to the bottom of the support leg 1, which are precisely matched with the pre-embedded connector (steel base with positioning pin) at the top of the steel cage 6. After the positioning pin is inserted, it is fixed by bolts. The support leg 1 can withstand the vertical load when the steel cage is hoisted and avoid deformation.

[0025] The sliding cover plate 3 has limit blocks at both ends of its sliding path. When it slides to the avoidance position, the cover plate is completely deviated from the hoisting path of the steel cage. The keel at the bottom of the cover plate has limit holes, which are fixed to the limit blocks by pins to prevent the cover plate from sliding during hoisting and to ensure hoisting safety.

[0026] After the support leg 1 is connected to the steel cage 6, the center of gravity of the steel pipe scaffold 2 coincides with the center of gravity of the steel cage 6. During hoisting, the steel cage can remain horizontal, avoiding tilting and collision with the formwork frame 9.

[0027] Example 3: Concrete Curing Adaptive Protective Shed Device like Figure 4 As shown, this embodiment focuses on optimizing the airtightness and temperature and humidity control structure of the device for the steam curing process after concrete pouring. The specific configuration is as follows: The reset position of the sliding cover plate 3 is set directly below the arc top, aligned with the center line of the top of the concrete box girder 10. A rubber sealing strip is pasted on the bottom edge of the cover plate. After reset, the sealing strip fits into the template at the top of the box girder to reduce steam leakage.

[0028] The sealing roll 5 is replaced with a special tarpaulin for steam curing; a steel counterweight strip is sewn to the bottom of the roll 5 to ensure that it fits into the sealing groove at the top of the template frame 9 after being lowered, forming a circumferential seal; Velcro is pasted on both sides of the roll, and adjacent rolls can be spliced ​​and sealed to fit box girders 10 of different lengths.

[0029] Four sensor mounting holes are reserved on the keel at the bottom of the sliding cover plate 3, into which temperature and humidity sensors can be inserted. The sensor probes extend into the sealed space to monitor the maintenance environment parameters in real time. Two steam inlets are reserved on the horizontal straight steel pipe of the steel pipe shed 2 to adapt to the steam pipe and control the amount of steam input to maintain a constant temperature and humidity environment in the sealed space.

[0030] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A multifunctional mobile protective shed device, characterized in that, Includes support legs (1), steel pipe frame (2), sliding cover plate (3), sliding wheel assembly (4), and sealing roll material (5); The support leg (1) is set vertically, and a steel pipe frame (2) is set on the top of the support leg (1). A sliding cover plate (3) is set above the steel pipe frame (2). A sliding wheel group (4) is connected below the sliding cover plate (3), and a closed roll material (5) is set on both sides of the sliding cover plate (3).

2. The multifunctional mobile protective shed device according to claim 1, characterized in that, The steel pipe shed (2) is composed of arc-shaped steel pipes and horizontal straight steel pipes. The arc-shaped steel pipes are the top load-bearing structure, and the horizontal straight steel pipes are the bottom support structure. The two ends of the arc-shaped steel pipes are fixedly connected to the two ends of the horizontal straight steel pipes one by one, forming an overall bow-shaped frame structure.

3. The multifunctional mobile protective shed device according to claim 2, characterized in that, Several inclined steel pipes are evenly arranged between the arc-shaped steel pipe and the horizontal straight steel pipe. The two ends of each inclined steel pipe are welded and fixed to the middle of the arc-shaped steel pipe and the middle of the horizontal straight steel pipe, respectively. Adjacent inclined steel pipes are connected end to end to form a triangular stable support structure, which enhances the overall load-bearing strength of the steel pipe shed (2).

4. The multifunctional mobile protective shed device according to claim 1, characterized in that, The sliding cover plate (3) is slidably mounted on the top of the steel pipe shed (2) by means of a sliding wheel set (4). Specifically, the sliding wheel set (4) is in rolling cooperation with the arc-shaped steel pipe of the steel pipe shed (2), which drives the sliding cover plate (3) to slide back and forth along the arc-shaped steel pipe.

5. A multifunctional mobile protective shed device according to claim 4, characterized in that, The sliding wheel assembly (4) includes a wheel frame and a wheel body. The wheel frame is detachably connected to the bottom of the sliding cover plate (3) by bolts. The wheel body is rotatably installed in the wheel frame and is adapted to the outer wall of the arc-shaped steel pipe at the top of the steel pipe frame (2) to ensure that the wheel body rolls stably along the arc-shaped steel pipe.

6. The multifunctional mobile protective shed device according to claim 1, characterized in that, The internal space of the protective canopy device is a canopy space for accommodating the steel frame (6) or concrete box girder (10); the top of the closed roll (5) is fixedly connected to the two sides of the sliding cover plate (3); the closed roll (5) can be lowered and retracted; when the closed roll (5) is lowered, the closed roll (5) falls to the bottom of the canopy space, thus closing the canopy space; when the closed roll (5) is retracted, the canopy space is in an open state.

7. The multifunctional mobile protective shed device according to claim 1, characterized in that, When the multifunctional mobile protective shed device is used during the rebar tying operation, the support leg (1) is installed on the preset fixed point of the rebar tying frame (7) through a detachable connector to achieve stable positioning of the steel pipe shed frame (2).

8. A multifunctional mobile protective shed device according to claim 7, characterized in that, The steel bar binding frame (7) is laid with intersecting horizontal and vertical steel bars to form the steel bar skeleton (6). The support leg (1) avoids the steel bar laying area and is installed on the steel frame of the steel bar binding frame (7). After the steel bar skeleton (6) is tied, the position of the sliding cover plate (3) is adjusted by the sliding wheel group (4) to reserve operating space for subsequent steel bar cage hoisting or concrete pouring processes.

9. A multifunctional mobile protective shed device according to claim 8, characterized in that, The arc-shaped steel pipe at the top of the steel pipe shed (2) is pre-set as a lifting point structure for connecting the lifting wire rope (8); the bottom of the support leg (1) is equipped with a detachable fixing structure that is compatible with the pre-embedded connector at the top of the steel reinforcement frame (6).

10. A multifunctional mobile protective shed device according to claim 9, characterized in that, Before the concrete pouring operation of the box girder, a closed curing space is formed around and on the top of the concrete box girder (10) by the structural cooperation of the sliding cover plate (3) and the closed roll material (5).

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