A cast-in-place box girder maintenance covering auxiliary laying device

Abstract

The present application relates to the technical field of cast-in-situ box girder maintenance construction, and particularly relates to a cast-in-situ box girder maintenance covering auxiliary laying device. The present application comprises a laying assembly and a moving assembly, the moving assembly is installed at the bottom of the laying assembly and drives the laying assembly to move for laying operation, a rolling assembly moves along with the laying assembly and compacts the maintenance covering material on the ground, an edge fixing assembly is used for connecting the overlapping part of the laid maintenance covering material, and a watering assembly is used for spraying water to the laid covering material. The laying assembly realizes automatic laying of the maintenance covering material, is suitable for continuous maintenance operation of large-area and long-distance box girders, the rolling assembly can compact the covering material tightly, the edge fixing assembly can connect and fix the overlapping part of the laid material, effectively prevents the covering material from being displaced and blown away due to strong wind or other external forces, avoids exposing the concrete surface due to loose material joints, and the device integrates the watering assembly, so that watering operation can be performed in time after the maintenance covering material is laid.

Description

Technical Field

[0001] This invention relates to the technical field of cast-in-place box girder curing construction, and in particular to an auxiliary laying device for covering cast-in-place box girder curing. Background Technology

[0002] Cast-in-place box girders are a common structural form in modern bridge engineering, widely used in the construction of transportation infrastructure such as highways and railways. During the construction of cast-in-place box girders, formwork is typically erected on-site, concrete is poured, and subsequent processes can only proceed after the concrete reaches its design strength. Due to the large volume and long span of cast-in-place box girders, the construction environment is often complex. Ensuring the quality of curing after concrete pouring directly affects the durability and safety of the bridge. The necessity of concrete curing for cast-in-place box girders is mainly reflected in the following aspects: First, during the early curing stage, the concrete needs to maintain suitable temperature and humidity to prevent moisture loss, promote cement hydration, and ensure structural strength and density. Second, proper curing can effectively reduce surface cracks, improve durability, and prevent shrinkage cracking caused by early water loss. Finally, the curing process can improve the surface properties of the concrete, enhancing its resistance to freezing and impermeability, thus providing a guarantee for the later operation of the bridge.

[0003] Commonly used curing methods for cast-in-place box girders include covering and watering. Covering usually involves laying materials such as plastic film, geotextile, and burlap sacks on the concrete surface to isolate it from air and sunlight, reduce the evaporation rate, and keep the concrete surface moist. Watering involves spraying water onto the concrete surface regularly to replenish moisture and prevent drying. In addition, some projects also use auxiliary materials such as moisturizers to further improve the curing effect.

[0004] However, in actual engineering projects, the existing methods of covering and laying maintenance materials are mostly manual or assisted by simple tools, which have many shortcomings. On the one hand, manual handling and laying of covering materials is time-consuming and labor-intensive, especially in the construction of large-area, long-span box girders, where the labor intensity is high and the efficiency is low. On the other hand, traditional covering materials such as plastic film and geotextile are greatly affected by the weather. In windy weather, they are easily blown away or displaced, resulting in the exposure of the maintenance surface, which affects the moisture retention effect of the concrete surface and thus affects the overall maintenance quality. In addition, the fixing method of covering materials is mostly simple weight-bearing, which is not stable enough, has high maintenance costs, and cannot meet the needs of bridge construction sites for efficient and reliable maintenance.

[0005] Publication number CN217078341U discloses a moisture-retaining device for curing, including a trolley with multiple wheels mounted on its bottom and a push handle fixedly connected to its top. The top of the trolley is rotatably connected to a shaft via two support mechanisms, and a geotextile roll is sleeved on the shaft. A water tank is fixedly connected to the top of the trolley, and a water outlet pipe is installed through the bottom of the outer wall of the water tank. A water spraying pipe is fixedly connected to the top of the trolley via a bracket, and the inlet end of the water spraying pipe is connected to the outlet pipe of the water tank. This technology sprays water only on the upper surface of the geotextile, lacking the ability to spray water on concrete surfaces, making it unsuitable for the curing needs of plastic films. Furthermore, it requires a large volume of water to penetrate, resulting in high evaporation costs. Summary of the Invention

[0006] To address the problems of time-consuming and labor-intensive laying and easy displacement of covering materials in existing technologies, and to improve the efficiency and quality of laying maintenance materials, this invention provides an auxiliary laying device for the maintenance covering of cast-in-place box girders.

[0007] The present invention provides an auxiliary laying device for curing and covering cast-in-place box girders, which adopts the following technical solution: A support device for laying a curing cover for cast-in-place box girders includes a laying component and a moving component. The laying component is used to install a roll of curing cover material and lay the curing cover material onto the upper surface of the cast-in-place box girder. The moving component is installed at the bottom of the laying component and drives the laying component to move and lay the material. A rolling component is provided behind the laying component. The rolling component moves with the laying component and presses the curing cover material onto the upper surface of the cast-in-place box girder. An edge fixing component is installed behind the laying component. The edge fixing component is used to connect the overlapping parts of the curing cover material. A water spraying component is installed behind the rolling component. The water spraying component is used to spray water onto the laid cover material.

[0008] The automatic laying of curing covering material is achieved through the laying components, reducing manual operation and significantly improving laying speed and construction efficiency. It is particularly suitable for continuous curing operations of large-area and long-distance box girders. The device uses moving components to drive the laying components, eliminating the heavy work of manual handling and spreading of materials, significantly reducing the labor intensity of construction workers, and improving the working environment. The rolling components can tightly compact the covering material, making it fit the surface of the cast-in-place box girder, effectively preventing the covering material from shifting or being blown away by strong winds or other external forces, ensuring that the curing surface is continuously protected and improving the curing quality. The edge fixing components can connect and fix the overlapping parts of the laid material, improving the overall sealing and stability of the covering, and preventing the concrete surface from being exposed due to loose material joints. The device integrates a water spraying component, which can spray water in time after the curing covering material is laid, keeping the concrete surface moist, promoting the cement hydration reaction, and improving the curing effect. The automated and integrated operation process reduces human operation errors, ensuring that each step is carried out in a standardized manner, which helps to improve the curing uniformity of the box girder concrete and the overall structural performance.

[0009] Furthermore, the laying assembly includes an unwinding sleeve, which is oscillatingly mounted on one side by a swing rod and fixedly mounted on the other side by a locking buckle. A protective cover is installed on the outside of the unwinding sleeve, which encloses the unwinding sleeve and the transmission components of the laying process. The protective cover is fixedly mounted on the frame.

[0010] The unwinding sleeve in the laying assembly is installed with a swing rod on one side and a locking buckle on the other side, making the replacement and installation of the covering material faster and more efficient. Construction personnel can quickly disassemble and replace material rolls, reducing downtime and improving construction continuity. A protective cover is installed on the outside of the unwinding sleeve, which can effectively wrap the unwinding sleeve and the transmission components during the laying process, preventing injury or equipment failure caused by misoperation or debris getting caught in during construction. The protective cover is fixed by the frame, with a stable structure, which can prevent the impact of external environment such as dust and rainwater on the unwinding sleeve and transmission components, improving work reliability. Under the protection of the protective cover, the unwinding sleeve runs smoothly and the material is released evenly, creating good conditions for subsequent laying and compaction, and further ensuring the flatness and tightness of the curing covering material.

[0011] Furthermore, the transmission components for the laying process include a tension roller and a conveyor roller. The tension roller and the conveyor roller are sequentially installed on the unwinding side of the unwinding sleeve. After the curing covering material is drawn out from the unwinding sleeve, it passes around the tension roller and the conveyor roller in sequence. The tension roller is moved and installed by an adjusting cylinder. The tension roller is elastically connected to the extension and retraction front end of the adjusting cylinder through a tension spring. The tension spring is provided with sensing contacts at both ends. The sensing contacts make contact and disconnect as the tension spring extends and retracts. The conveyor roller is driven and connected to an unwinding motor. A pressure roller is installed on one side of the conveyor roller. The pressure roller is installed through a pressure spring and presses against the conveyor roller.

[0012] By sequentially installing tension rollers and conveyor rollers on the unwinding side of the unwinding sleeve, the curing cover material can be effectively tensioned and smoothly conveyed after being drawn from the unwinding sleeve, preventing material slack, folding, or deviation, thus ensuring laying quality. The tension rollers are moved and installed using an adjustable cylinder and are elastically connected via tension springs. Both ends of the tension springs are equipped with sensor contacts that automatically sense and adjust the position of the tension rollers based on material tension, achieving intelligent tension adjustment to adapt to cover materials of different thicknesses and materials, improving the equipment's versatility and automation level. The sensor contacts engage and disengage with the tension spring's extension and retraction, allowing real-time monitoring of the tension status. If the material is too tight or too loose, a feedback signal is promptly sent, triggering the control system to adjust and prevent cover material breakage or accumulation due to abnormal tension, effectively improving operational safety. The conveyor rollers are driven by the unwinding motor, ensuring stable and uniform delivery of the cover material. A pressure roller is installed on one side of the conveyor rollers to facilitate smooth material conveying. This structure achieves integrated automatic control of material tensioning, conveying, and compaction, significantly reducing manual labor, lowering labor intensity, and improving construction efficiency and equipment reliability.

[0013] Furthermore, a cutting blade is installed on one side of the unwinding sleeve, the cutting blade is slidably mounted on the cutting slide rail, and a pad is provided on the cutting side of the cutting blade, through which the curing covering material passes.

[0014] The cutter is installed on one side of the unwinding sleeve and is slidably positioned by the cutting slide rail. It can precisely cut the curing covering material according to actual needs. A pad is set on the cutting side. The pad not only increases the support surface for cutting and prevents accidental damage to the material, but also effectively protects the operator's hands, improves operational safety, facilitates stopping the laying and avoids waste.

[0015] Furthermore, the moving component includes a moving wheel, which is connected to a power-assisted motor. A speed regulator is provided between the moving wheel and the power-assisted motor, and a track is installed on the outer side of the moving wheel.

[0016] The mobile component adopts a wheel structure and is driven by a power-assisted motor, enabling the equipment to move quickly and stably. Compared with purely manual or no-powered devices, it greatly improves the mobility of the laying equipment on the work site, shortens the transfer and adjustment time, and provides a speed regulator between the wheels and the power-assisted motor. The speed can be flexibly adjusted according to the actual needs of the site to adapt to different laying conditions and operating habits, ensuring the smooth operation of the equipment in complex terrain or meticulous construction. Tracks are installed on the outside of the wheels, which significantly improves the equipment's passability and grip on various complex ground surfaces, preventing the equipment from slipping or getting stuck, ensuring the continuity and reliability of the laying process, and ensuring straight-line travel. The motor-assisted and tracked structure can automatically drive the equipment to move, reducing manual pushing, pulling and carrying, reducing the labor intensity of operators, improving the overall construction comfort and efficiency, and making it suitable for large-area and long-distance coverage operations.

[0017] Furthermore, the moving component includes a steering wheel, which is a universal wheel. The steering wheel is rotatably mounted in a fixed sleeve via a rotating shaft. A fixing pin is provided on the rotating shaft of the steering wheel. A fixing slot is opened on the fixed sleeve. The fixing pin and the fixing slot have two states: insertion and separation. The fixing pin and the fixing slot are connected to each other by gravity.

[0018] The mobile component uses casters as steering wheels, which can rotate freely, allowing the equipment to easily turn around, change direction, or make minor adjustments to its position, improving operational flexibility. The steering wheels are mounted in a fixed sleeve via a rotating shaft, with a fixing pin on the shaft. The fixed sleeve has a fixing slot, allowing the fixing pin to be engaged or disengaged from the fixing slot. Operators can quickly switch between the fixed and steering modes as needed to adapt to different construction requirements, such as straight-line movement or turning. The fixing pin and fixing slot are engaged by gravity, a simple design that eliminates the need for complex locking mechanisms. When the fixing pin and fixing slot are engaged, the steering wheels are locked, ensuring stability during straight-line movement or positioning, preventing deviation or shaking and improving laying accuracy.

[0019] Furthermore, the rolling assembly includes a rolling cylinder, which is set close to the ground. The rolling cylinder is mounted on the frame via a rolling support rod. The rolling support rod is elastically mounted on the frame via an adjusting spring. One end of the adjusting spring is connected to the rolling support rod, and the other end is mounted on the frame via an adjusting bolt. The adjusting bolt controls the elastic tension of the adjusting spring by screwing it in and out.

[0020] The rolling cylinder in the rolling assembly is set close to the ground, uniformly rolling the curing material during equipment movement. This effectively eliminates air bubbles and wrinkles, ensuring full adhesion between the material and the ground, thus improving the overall laying quality. The rolling cylinder is mounted on the frame via rolling support rods. These support rods employ an adjustable spring elastic mounting structure. This design allows the rolling cylinder to automatically adjust its clamping force according to slight changes in ground elevation, adapting to different terrains and preventing uneven rolling or material damage caused by uneven ground. One end of the adjusting spring is connected to the rolling support rod, and the other end is fixed to the frame via an adjusting bolt. By screwing the adjusting bolt in or out, the spring tension and the pressure of the rolling cylinder on the ground can be precisely adjusted to meet the clamping force requirements of different materials and construction processes, improving construction adaptability and process control. The elastic mounting structure effectively absorbs vibrations and impacts generated during equipment operation, reducing damage to the rolling cylinder and curing material, and extending the service life of both equipment and materials. The adjusting bolt design simplifies pressure adjustment, allowing users to quickly adjust according to actual construction conditions without disassembling complex structures, improving on-site maintenance efficiency and ease of use.

[0021] Furthermore, the edge fixing assembly includes a sewing roller, which is set close to the ground. A heating strip is provided on the outer ring of the sewing roller. The heating strip is electrically heated. The sewing roller is elastically mounted via a telescopic shaft. The heating strip is connected to a heating battery via a wire.

[0022] The sewing roller is equipped with a heating strip on its outer ring. This electric heating softens the edges of the covering material, and combined with the roller's rolling action, allows for heat-fusion sewing of the material edges during movement, achieving a strong and continuous bond. This prevents edges from lifting or separating, significantly improving the reliability of edge fixation. The real-time heating function of the heating strip allows edge sewing to be performed simultaneously with laying, eliminating the need for additional heating or multiple operations, simplifying the process and improving work efficiency. The sewing roller is flexibly installed via a telescopic shaft, automatically adjusting the clamping force according to ground undulations or material thickness, ensuring uniformity and continuity during heating and rolling, and preventing poor sewing or material damage due to uneven pressure.

[0023] Furthermore, the edge fixing component includes a fixing wheel, which is set close to the ground. A transition wheel and an installation shaft are installed on one side of the fixing wheel. The installation shaft is used to install the suture tape roll. The suture tape is led out from the suture tape roll on the installation shaft and passes around the transition wheel and the fixing wheel in sequence. A hook is provided on one side of the suture tape. The hook includes an elastic pin and a barbed hook. The suture tape is squeezed and pierced through the maintenance covering material by the fixing wheel and then sewn.

[0024] The fixed rollers are positioned close to the ground. The stitching tape passes sequentially from the stitching tape roll through the transition rollers and the fixed rollers. Under the squeezing action of the fixed rollers, the stitching tape can stably and continuously pierce the edge of the curing cover material, achieving a fast and firm physical sew. This effectively prevents the edge from lifting or coming undone, improving the overall sealing and reliability of the cover. The stitching tape roll works in conjunction with the installation shaft to continuously supply stitching tape, enabling automated sewing operations. The transition rollers guide the stitching tape to run smoothly, avoiding jamming or tangling, making the sewing process continuous and smooth, significantly improving the construction efficiency of edge fixing. It is suitable for large-area continuous operations. A hook is provided on one side of the stitching tape, including an elastic pin and a barbed hook. The elastic pin facilitates insertion into the material, while the barbed hook prevents the stitching tape from coming out of the material, significantly enhancing the tensile strength and durability of the sewing point, ensuring the stability and durability of the edge connection.

[0025] Furthermore, the water spraying assembly includes spray nozzles, which are connected to a water tank via spray pipes. The spray pipes are connected in the middle via a T-junction, dividing the spray pipes into two sections. One spray pipe has a spray nozzle that sprays water towards the bottom surface of the curing cover material, while the other spray pipe has a spray nozzle that sprays water towards the top surface of the curing cover material. Each of the two spray pipes is equipped with a stop valve, and the spray pipes are connected to the water tank via a water pump.

[0026] The water spray system is divided into two lines using a three-way connector. One line sprays water towards the bottom surface of the covering material, while the other sprays water towards the top surface, enabling simultaneous watering of both the top and bottom surfaces of the covering material. This ensures uniform wetting of the covering layer, effectively improving the curing effect. Each water spray line is equipped with a stop valve, allowing for independent control of the water flow and spray intensity. Depending on the actual needs, water can be sprayed only on the top and bottom surfaces or both surfaces simultaneously, meeting the curing requirements of different construction stages and material characteristics, and improving water efficiency. The water spraying components are connected to a water tank via a water pump, which automatically provides stable water pressure, ensuring uniform and continuous spraying. Compared to manual watering, the automated water supply system significantly improves the efficiency and uniformity of curing operations while reducing manual labor intensity.

[0027] In summary, the present invention has the following beneficial technical effects: 1. Enables automatic and continuous laying of curing covering materials, significantly improving the construction speed and efficiency of curing large-area, long-distance concrete box girders and reducing manual operations.

[0028] 2. The mobile components, motor assistance, and tracked structure significantly reduce the physical burden on construction workers, reduce heavy work such as handling and paving, and improve the on-site working environment.

[0029] 3. The rolling assembly ensures that the covering material is in close contact with the upper surface of the cast-in-place box girder, preventing the material from shifting, bulging or warping due to wind or external forces, thus improving the quality of maintenance.

[0030] 4. The edge fixing components adopt hot-melt or physical stitching methods to automatically and firmly connect the overlapping parts of the materials during the laying process, thereby improving the overall sealing and stability of the coverage.

[0031] 5. The tension roller, in conjunction with sensors and automatic adjustment, enables intelligent tensioning and smooth conveying of the curing covering material, preventing material from loosening, folding, deviating, or breaking.

[0032] 6. The unwinding sleeve structure and cutting blade slide rail design facilitate quick material replacement and precise cutting, reducing downtime and improving construction continuity and operational safety.

[0033] 7. The combination of tracks and casters allows for flexible speed adjustment and steering, ensuring stable operation of the equipment in different terrains and adapting to various field environments.

[0034] 8. The water sprinkler system has the functions of spraying water from both the top and bottom and independent control, which automatically keeps the concrete surface and covering material moist, promotes full hydration of cement, and improves the uniformity and effect of curing.

[0035] 9. Roller components, stitching rollers, etc., adopt flexible installation and adjustable elastic tension to automatically adapt to changes in ground or material thickness, reducing damage caused by uneven pressure.

[0036] 10. Link all functional components to achieve automated, integrated, and standardized operating procedures, reduce manual intervention and misoperation, ensure construction quality, and improve the durability and overall performance of cast-in-place box girder concrete structures. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure in use of the present invention; Figure 2 for Figure 1 A second-person perspective illustration; Figure 3 for Figure 1 A third-person perspective illustration; Figure 4 This is a schematic diagram of the bottom and internal structure of the present invention; Figure 5 for Figure 4 A magnified view of part A; Figure 6 for Figure 4 A magnified view of part B; Figure 7 for Figure 4 A magnified view of part C.

[0038] Explanation of reference numerals in the attached figures: 1. Unwinding sleeve; 11. Tensioning roller; 111. Adjusting cylinder; 112. Tensioning spring; 113. Induction contact; 12. Conveyor roller; 121. Unwinding motor; 122. Pressure roller; 123. Pressure spring; 13. Cutting knife; 131. Cutting slide rail; 132. Pad; 14. Protective cover; 141. Frame; 2. Moving wheels; 21. Power assist motor; 211. Speed ​​controller; 22. Steering wheel; 221. Fixed... 222, Fixed sleeve, 223, Fixed groove, 23, Track, 3, Roller roller, 31, Roller support rod, 32, Adjusting spring, 33, Adjusting bolt, 4, Stitching roller, 41, Heating strip, 411, Telescopic shaft, 412, Heating battery, 42, Fixed strip wheel, 421, Transition wheel, 422, Mounting shaft, 5, Spray nozzle, 51, Spray pipe, 511, Stop valve, 52, Water pump, 53, Water tank. Detailed Implementation

[0039] The following will be combined with the appendix Figures 1-7 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0041] Example 1: This invention discloses an auxiliary laying device for curing and covering cast-in-place box girders, comprising a laying component and a moving component. The laying component is used to install a roll of curing and covering material and lay the curing and covering material onto the upper surface of the cast-in-place box girder. The moving component is installed at the bottom of the laying component and drives the laying component to move and lay the material. A rolling component is provided behind the laying component. The rolling component moves with the laying component and presses the curing and covering material onto the upper surface of the cast-in-place box girder. An edge fixing component is installed behind the laying component. The edge fixing component is used to connect the overlapping parts of the curing and covering material. A water spraying component is installed behind the rolling component. The water spraying component is used to spray water onto the laid covering material.

[0042] The laying assembly is used to install rolls of curing cover material, such as geotextile or plastic film, and lays the cover material flat on the surface of the cast-in-place box girder by rotating or pulling. The moving assembly is installed at the bottom of the laying assembly, such as a wheeled trolley or tracked vehicle, and is driven by manpower or power to move the entire device along the surface of the box girder, thereby achieving continuous laying of the cover material. The rolling assembly is located behind the laying assembly and is usually composed of rubber or metal rollers. It moves with the device and rolls the laid curing cover material to ensure that it adheres tightly to the ground and avoids air bubbles or wrinkles. The edge fixing assembly is installed behind the rolling assembly and is used to connect and fix the edges or overlapping parts of the cover material. It can use methods such as hot melt, pressure strips, magnetic attraction, and clamps to ensure that the material is not easily moved by wind and rain. The water spraying assembly is located behind the edge fixing assembly and is used to spray water on the laid cover material to keep the material surface moist, which is beneficial to concrete curing.

[0043] Check that all components of the device are securely installed, ensure that there is sufficient covering material roll inside the laying component, clean up debris in the laying area, ensure that the upper surface of the cast-in-place box girder is flat, install the curing covering material roll on the material shaft of the laying component, fix it to prevent slippage, and adjust the material outlet to ensure that the material can be spread out smoothly.

[0044] Turn on the drive system of the moving component, and the control device moves slowly along the surface of the box girder. Pay attention to adjusting the moving speed to ensure that the covering material is laid evenly and without stretching or deformation. As the device moves, the covering material automatically unfolds and is laid on the concrete surface. The rolling component follows closely behind to compact the material and eliminate air bubbles and wrinkles.

[0045] The edge fixing components automatically connect and clamp at the material overlap, ensuring that the curing cover material is stable and does not shift. The clamp spacing and pressure can be set as needed.

[0046] The sprinkler system sprays water evenly onto the surface of the laid material to maintain appropriate humidity and promote concrete curing. The water volume and nozzle angle can be adjusted to adapt to different materials and climatic conditions.

[0047] In large-scale bridge engineering, cast-in-place box girders are often quite long, making manual laying inefficient and prone to material misalignment. This device utilizes a moving assembly for automatic advancement, ensuring continuous and uniform material laying, significantly improving construction efficiency. The edge fixing and rolling devices work together to ensure the covering material adheres tightly to the concrete, while a water spraying system provides real-time curing, effectively reducing manual labor.

[0048] Example 2: Based on Example 1, the following is added: Reference Figures 1-4The laying assembly includes an unwinding sleeve 1. The unwinding sleeve 1 is swung and installed on one side by a swing rod, and fixed on the other side by a locking buckle. A protective cover 14 is installed on the outside of the unwinding sleeve 1. The protective cover 14 covers the unwinding sleeve 1 and the transmission components of the laying process. The protective cover 14 is installed and fixed by a frame 141.

[0049] Reference Figure 4 and Figure 5 The transmission components of the laying process include a tension roller 11 and a conveyor roller 12. The tension roller 11 and the conveyor roller 12 are installed sequentially on the unwinding side of the unwinding sleeve 1. After the curing covering material is drawn out from the unwinding sleeve 1, it passes around the tension roller 11 and the conveyor roller 12 in sequence. The tension roller 11 is moved and installed under the control of the adjusting cylinder 111. The tension roller 11 is elastically connected to the front end of the adjusting cylinder 111 via a tension spring 112. The tension spring 112 is provided with sensing contacts 113 at both ends. The sensing contacts 113 contact and disconnect as the tension spring 112 extends and retracts. The conveyor roller 12 is connected to the unwinding motor 121. A pressure roller 122 is installed on one side of the conveyor roller 12. The pressure roller 122 is installed by a pressure spring 123 and presses against the conveyor roller 12.

[0050] Reference Figure 1 and Figure 2 A cutting blade 13 is installed on one side of the unwinding sleeve 1. The cutting blade 13 is slidably mounted on the cutting slide rail 131. A pad 132 is provided on the cutting side of the cutting blade 13. The curing covering material passes between the cutting blade 13 and the pad 132.

[0051] The unwinding sleeve 1 is used to install the curing cover material roll. One side of the unwinding sleeve 1 allows for swinging installation via a swing rod, facilitating material roll replacement. The other side is secured with a locking buckle to ensure the material roll remains stable and does not shift during laying. A protective cover 14 encloses the unwinding sleeve 1 and all transmission components involved in the laying process, preventing dust and debris from interfering with operation and reducing natural wind interference during the laying process, while also ensuring operational safety. The protective cover 14 is securely mounted to the main body of the device via a frame 141. A tension roller 11 is installed on the unwinding side of the unwinding sleeve 1 to adjust the tension of the curing cover material. The tension roller 11 is controlled to move via an adjusting cylinder 111. A tension spring 112 is elastically connected to the front end of the cylinder for automatic tension adjustment. Sensing devices are located at both ends of the tension spring 112. Contact point 113 senses the tension of the covering material in real time and provides feedback on the tension signal by contacting or disconnecting it, which is beneficial for automated control. The conveyor roller 12 is located after the tension roller 11 and is responsible for uniformly conveying the material to the laying area. The conveyor roller 12 is connected to the unwinding motor 121 to ensure stable material output. A pressure roller 122 is installed on one side of the conveyor roller 12. The pressure roller 122 is squeezed against the conveyor roller 12 by a pressure spring 123 to ensure that the material is delivered flat and without wrinkles. The cutter 13 is installed on one side of the unwinding sleeve 1 and slides laterally through the cutter slide rail 131. It is used to cut the curing covering material. A pad 132 is provided on the cutting side of the cutter 13. The material passes between the cutter 13 and the pad 132 to ensure neat cutting.

[0052] Lower the unwinding sleeve 1, install the curing cover material roll onto the unwinding sleeve 1, return it to position by swinging the lever, and after locking it to ensure that the material roll is not loose, return it to position by swinging the lever, control the fixing clamp to extend and clamp the unwinding sleeve 1, pass the material head through the tension roller 11 and the conveying roller 12, and let it pass between the cutter 13 and the pad 132.

[0053] Start the adjusting cylinder 111 to move the tension roller 11. The tension spring 112 automatically adjusts the tension, and the sensing contact 113 monitors in real time to ensure that the material is in an appropriate tension state and avoids being too tight or too loose. Start the unwinding motor 121, and the conveying roller 12 drives the material to be output evenly. The pressing roller 122 applies pressure to the material through the pressing spring 123, so that it is laid flat on the concrete surface of the box girder.

[0054] If wrinkles are found in the material or the conveying is not smooth, the parameters of the compression spring 123 or tension spring 112 can be adjusted appropriately. After reaching the specified laying length, the cutter 13 is slid on the cutting slide rail 131 to the cutting position. The material is cut between the cutter 13 and the pad 132 to ensure a neat cut. When replacing a new material roll, loosen the lock, swing the unwinding sleeve 1, and repeat the above installation process.

[0055] Excessive material tension can easily cause stretching and deformation, while insufficient tension can easily cause wrinkles. By adjusting the cylinder 111 and the tension spring 112, the tension can be kept moderate, and the feedback signal from the sensing contact 113 can be accurate.

[0056] During the construction of long-span bridges on highways, curing covering materials need to be laid quickly on the surface of large-area cast-in-place box girders. This device can efficiently complete the automatic conveying, tensioning and cutting of materials, significantly improving construction efficiency. Operators only need a small amount of intervention to achieve long-distance, continuous coverage and ensure the quality of concrete curing.

[0057] Example 3: Based on Example 1, the following is added: Reference Figures 1-4 The moving component includes a moving wheel 2, which is connected to a power-assisted motor 21. A speed regulator 211 is provided between the moving wheel 2 and the power-assisted motor 21. A track 23 is installed on the outer side of the moving wheel 2.

[0058] Reference Figure 4 and Figure 6 The movable component includes a steering wheel 22, which is a universal wheel. The steering wheel 22 is rotatably mounted in a fixed sleeve 221 via a rotating shaft. A fixing pin 222 is provided on the rotating shaft of the steering wheel 22. A fixing slot 223 is opened on the fixed sleeve 221. The fixing pin 222 and the fixing slot 223 have two states: insertion and separation. The fixing pin 222 and the fixing slot 223 are connected to each other by gravity.

[0059] The moving wheel 2 supports and propels the entire paving device forward. Tracks 23 are installed on the outside of the device. Tracks 23 enhance the device's adaptability to complex, slippery, or uneven ground, ensuring smooth movement. The power assist motor 21 is connected to the moving wheel 2 and provides power to drive the device to move along the surface of the box girder. The power assist motor 21 can adjust the output speed and torque according to actual working needs. The speed regulator 211 is located between the moving wheel 2 and the power assist motor 21 and can manually or automatically adjust the speed of the moving wheel, which is convenient for flexible adjustment according to the construction environment and paving speed requirements.

[0060] The steering wheel 22 is used to control the direction of the device. The steering wheel 22 is installed in the fixed sleeve 221 through the rotating shaft, which facilitates flexible rotation in multiple directions. By inserting or separating the fixing pin 222 and the fixing slot 223, the fixing or rotation of the steering wheel 22 is controlled. In the inserted state, the universal wheel is locked to achieve straight-line travel. In the separated state, the universal wheel can rotate freely to achieve turning or angle adjustment of the device. The fixing pin 222 and the fixing slot 223 are self-locked by gravity, which facilitates quick operation.

[0061] Check the installation of the moving wheel 2, track 23 and steering wheel 22 to ensure that the power assist motor 21 and speed controller 211 are working properly. Select whether to activate the track assist function according to the surface conditions of the box girder. Set an appropriate moving speed through the speed controller 211 to ensure that the material output and the forward speed of the device are coordinated during the laying process. When straight laying is required, insert the fixing pin 222 of the steering wheel 22 into the fixing slot 223 to lock the direction. If turning or adjusting the angle is required, separate the fixing pin 222 and use the caster wheels to achieve flexible steering.

[0062] Start the power assist motor 21 to drive the moving wheel 2 to move the device forward along the surface of the box girder. The track 23 provides extra grip on uneven or wet road surfaces to prevent slippage. The operator can adjust the device's moving speed in a timely manner through the speed controller 211 according to the actual site conditions to ensure that the laying of the covering material is uniform and flat. When encountering obstacles or needing to change the laying direction, the fixing pin 222 is separated to make the steering wheel 22 rotate and adjust the device's traveling direction to a suitable position. After the direction adjustment is completed, the fixing pin 222 can be inserted again to lock the direction and continue to move in a straight line.

[0063] The material output speed must be precisely matched with the device movement speed to prevent material accumulation or stretching deformation.

[0064] When encountering box girder cross-sections with variations or when materials need to be laid in curved areas, operators can separate the fixing pins 222 of the steering wheel 22 to allow the caster wheel to rotate freely, flexibly adjust the direction of the device, easily adapt to the complex shape of the construction area, and ensure that the material is tightly attached to the surface of the box girder.

[0065] Example 4: Based on Example 1, the following is added: Reference Figure 1 , Figure 2 , Figure 4 and Figure 7 The rolling assembly includes a rolling cylinder 3, which is set close to the ground. The rolling cylinder 3 is mounted on the frame via a rolling support rod 31. The rolling support rod 31 is elastically mounted on the frame via an adjusting spring 32. One end of the adjusting spring 32 is connected to the rolling support rod 31, and the other end is mounted on the frame via an adjusting bolt 33. The adjusting bolt 33 controls the elastic tension of the adjusting spring 32 by screwing it in and out.

[0066] The roller 3 is a cylindrical component with its lower surface flush against the ground. Its main function is to compact the laid curing material, making it flat and adhered to the concrete surface of the box girder, thus improving the curing effect. The roller 3 is mounted on the frame via a roller support rod 31, which serves as a connection and support, allowing the roller 3 to float freely with the ground level to ensure uniform compaction. The roller support rod 31 is elastically mounted on the frame via an adjusting spring 32, which provides elastic pressure to the roller 3. It automatically adapts to uneven ground or changes in material thickness, ensuring that the roller 3 remains in close contact with the ground. One end of the adjusting spring 32 is connected to the roller support rod 31, and the other end is mounted on the frame via an adjusting bolt 33. The adjusting bolt 33 can be screwed in or out to change the tension or compression of the adjusting spring 32, thereby adjusting the pressure of the roller 3 on the ground to adapt to different materials and construction requirements.

[0067] Install the rolling cylinder 3 at the designated position on the frame via the rolling support rod 31, ensuring that the lower surface of the rolling cylinder 3 is in close contact with the ground or the surface of the paved material. Connect the adjusting spring 32 to the rolling support rod 31 and the frame, and install the adjusting bolt 33. Initially adjust the tension of the adjusting spring 32 so that the rolling cylinder 3 has appropriate downward pressure.

[0068] Depending on the thickness of the material being laid and the ground conditions, the compression of the adjusting spring 32 is increased by screwing in the adjusting bolt 33, thereby increasing the downward pressure of the roller 3. This is suitable for thicker or uneven materials. If it is necessary to reduce the pressure, the adjusting bolt 33 is unscrewed to reduce the tension of the adjusting spring 32, thereby weakening the pressure exerted by the roller 3 on the material. This is suitable for thinner, more fragile, or delicate materials.

[0069] The starting device moves the entire machine forward along with the moving components. Under the pressure of the spring, the rolling cylinder 3 remains in close contact with the ground or material surface, continuously rolling and compacting the covered material. If there are local protrusions or depressions, the rolling support rod 31 can automatically float with the adjusting spring 32 to adapt to the ground height and ensure uniform compaction without dead corners. During the laying process, the material compaction effect is observed regularly. If uneven compaction or local floating is found, the pressure of the adjusting spring 32 is adjusted in time by adjusting the adjusting bolt 33 to optimize the rolling effect.

[0070] In the construction of cast-in-place box girders for highways or railway bridges, the covering material needs to be compacted in time after it is laid to prevent air bubbles or wrinkles from forming between the material and the concrete surface. The roller cylinder 3 of this device can achieve continuous and uniform compaction, improve the adhesion between the curing material and the concrete, and ensure the curing effect.

[0071] Example 5: Based on Example 1, the following is added: Reference Figure 1 , Figure 2 , Figure 4 and Figure 7The edge fixing assembly includes a sewing roller 4, which is set close to the ground. A heating strip 41 is provided on the outer ring of the sewing roller 4. The heating strip 41 is electrically heated. The sewing roller 4 is elastically installed through a telescopic shaft 411. The heating strip 41 is connected to a heating battery 412 through a wire.

[0072] Reference Figures 2-4 The edge fixing component includes a fixing wheel 42, which is set close to the ground. A transition wheel 421 and a mounting shaft 422 are installed on one side of the fixing wheel 42. The mounting shaft 422 is used to install the suture tape roll. The suture tape is led out from the suture tape roll on the mounting shaft 422 and passes around the transition wheel 421 and the fixing wheel 42 in sequence. A hook is provided on one side of the suture tape. The hook includes an elastic pin and a barbed hook. The suture tape is squeezed and pierced through the maintenance covering material by the fixing wheel 42 and then sewn.

[0073] The sewing roller 4 is set close to the ground around its circumference and is used to heat and press the edges of the curing covering material to improve the sewing strength. The outer ring of the sewing roller 4 is equipped with a heating strip 41, which works by electric heating. The heating strip 41 is connected to a heating battery 412 through a wire to ensure continuous and safe heating. The sewing roller 4 is elastically installed through a telescopic shaft 411, so that the roller can automatically float with the change of ground or material thickness to ensure uniform heating and pressing effect.

[0074] The fixing wheel 42 is set close to the ground and is used to press the suture tape to pierce and fix the edge of the maintenance covering material. The mounting shaft 422 is used to install the suture tape roll. After the suture tape is drawn out from the suture tape roll, it passes through the transition wheel 421 and the fixing wheel 42 in sequence to ensure smooth conveying of the suture tape. A hook is provided on one side of the suture tape. The hook is composed of an elastic pin and / or a barbed hook, which can pierce the maintenance covering material and complete the suture fixation under the pressure of the fixing wheel 42.

[0075] When the heating battery 412 is turned on, the heating strip 41 starts to heat up, and the temperature of the outer ring of the sewing roller 4 rises to the set value. The pressing elasticity of the sewing roller 4 is adjusted by the telescopic shaft 411 so that it can automatically adapt to changes in ground or material thickness.

[0076] The moving component drives the whole machine to move along the edge of the box girder. The sewing roller 4 continuously heats and presses the edge covering material to improve the plasticity and adhesion of the material. Under the pressure of the fixed strip wheel 42, the sewing tape and the hooks (elastic pins and barbed hooks) pierce the edge of the covering material to achieve sewing and mechanical fixation, preventing the material edge from lifting or shifting. The hooks enter by oblique piercing, penetrate the two layers of covering material and connect them.

[0077] During the process, regularly check the suturing effect. If it is found that the fixation is not firm or the material is damaged, adjust the pressure of the suturing roller 4, the temperature of the heating strip 41, or the pressing strength of the fixing strip wheel 42 in time to ensure the suturing quality. Check the excess of the suturing tape roll and replace it in time to ensure continuous operation.

[0078] The temperature of heating strip 41 should be moderate. Too high a temperature may damage the covering material, while too low a temperature will affect the bonding and stitching effect. The appropriate heating temperature should be preset according to different material types.

[0079] In the construction of cast-in-place box girders for highways or railway bridges, the edges of the curing covering material are prone to warping or loosening. Using edge fixing components, which combine heated pressing with stitching rollers and mechanical fixing with stitching hooks, effectively improves edge adhesion and enhances the overall curing effect.

[0080] Example 6: Based on Example 1, the following is added: Reference Figures 1-5 The water spraying assembly includes a spray nozzle 5, which is connected to a water tank 53 via a spray pipe 51. The spray pipe 51 is connected in the middle by a T-junction, dividing the spray pipe into two sections. The spray nozzle 5 installed on one spray pipe sprays water towards the bottom surface of the curing covering material, and the spray nozzle 5 installed on the other spray pipe sprays water towards the top surface of the curing covering material. A stop valve 511 is installed on each of the two spray pipes of the spray pipe 51. The spray pipe 51 is connected to the water tank 53 via a water pump 52.

[0081] The spray nozzle 5 is used to evenly spray water onto the bottom or top surface of the curing covering material to effectively wet the curing material and the concrete surface. The spray nozzle 5 is connected to the water tank 53 through the spray pipe 51. The spray pipe 51 is divided into two pipes through a T-junction, which supply water to the bottom and top surfaces respectively. Each branch spray pipe is equipped with a stop valve 511 to control the on / off of the water flow of each pipe, so as to realize the individual or simultaneous spraying operation. The spray pipe 51 is connected to the water tank 53 through the water pump 52. The water pump 52 provides a stable water pressure to ensure that the water spray is uniform and the pressure is controllable. The water tank 53 serves as a water storage device and supplies water to the spray nozzle 5 through the pipe.

[0082] Turn on the water pump 52 to start the system, check that the water pressure is stable, and open or close the water stop valve 511 according to the actual maintenance needs to control the water spraying on the bottom or top surface to achieve directional or simultaneous maintenance. During the water spraying process, adjust the flow rate and pressure of the water pump 52 to ensure that the water outlet 5 sprays water evenly and the surface of the covering material is moderately moistened.

[0083] Regularly check the moisture status of the bottom and top surfaces of the curing covering material to ensure that the concrete surface maintains appropriate humidity. Adjust the spraying time, frequency and volume of water flexibly according to the site temperature, wind speed and curing requirements to optimize the curing effect.

[0084] The water tank should be kept at a sufficient level and replenished in a timely manner to avoid interruption of water spraying due to water shortage, which would affect the maintenance effect.

[0085] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the scope defined by the structure of the invention, and all such modifications and additions should fall within the protection scope of the present invention.

Claims

1. A support device for laying curing coverings for cast-in-place box girders, comprising a laying component and a moving component, wherein the laying component is used to install curing covering material rolls and lay the curing covering material onto the upper surface of the cast-in-place box girder, and the moving component is installed at the bottom of the laying component and drives the laying component to move and lay the material, characterized in that: A rolling assembly is installed behind the laying assembly. The rolling assembly moves with the laying assembly and presses the curing covering material onto the upper surface of the cast-in-place box girder. An edge fixing assembly is installed behind the laying assembly. The edge fixing assembly is used to connect the overlapping parts of the curing covering material. A water spraying assembly is installed behind the rolling assembly. The water spraying assembly is used to spray water onto the laid covering material.

2. The auxiliary laying device for curing and covering cast-in-place box girders according to claim 1, characterized in that: The laying assembly includes an unwinding sleeve (1), which is swung on one side by a swing rod and fixed on the other side by a locking buckle. A protective cover (14) is installed on the outside of the unwinding sleeve (1), which covers the unwinding sleeve (1) and the transmission components of the laying process. The protective cover (14) is fixed by a frame (141).

3. The auxiliary laying device for curing and covering cast-in-place box girders according to claim 2, characterized in that: The transmission components of the laying process include a tension roller (11) and a conveyor roller (12). The tension roller (11) and the conveyor roller (12) are installed sequentially on the unwinding side of the unwinding sleeve (1). After the curing covering material is drawn out from the unwinding sleeve (1), it passes around the tension roller (11) and the conveyor roller (12) in sequence. The tension roller (11) is moved and installed under the control of the adjusting cylinder (111). The tension roller (11) is elastically connected to the front end of the adjusting cylinder (111) through the tension spring (112). The tension spring (112) is provided with sensing contacts (113) at both ends. The sensing contacts (113) follow the extension and retraction of the tension spring (112) to make contact and disconnect. The conveyor roller (12) is connected to the unwinding motor (121). A pressure roller (122) is installed on one side of the conveyor roller (12). The pressure roller (122) is installed by a pressure spring (123) and presses against the conveyor roller (12).

4. The auxiliary laying device for curing and covering cast-in-place box girders according to claim 2, characterized in that: A cutting blade (13) is installed on one side of the unwinding sleeve (1). The cutting blade (13) is slidably installed on the cutting slide rail (131). A pad (132) is provided on the cutting side of the cutting blade (13). The curing covering material passes between the cutting blade (13) and the pad (132).

5. The auxiliary laying device for curing and covering cast-in-place box girders according to claim 1, characterized in that: The moving component includes a moving wheel (2), which is connected to a power-assisted motor (21). A speed regulator (211) is provided between the moving wheel (2) and the power-assisted motor (21). Tracks (23) are installed on the outside of the moving wheel (2).

6. The auxiliary laying device for curing and covering cast-in-place box girders according to claim 5, characterized in that: The moving component includes a steering wheel (22), which is a universal wheel. The steering wheel (22) is rotatably mounted in a fixed sleeve (221) via a rotating shaft. A fixing pin (222) is provided on the rotating shaft of the steering wheel (22). A fixing slot (223) is opened on the fixed sleeve (221). The fixing pin (222) and the fixing slot (223) have two states: insertion and separation. The fixing pin (222) and the fixing slot (223) are inserted into each other by gravity.

7. The auxiliary laying device for curing and covering cast-in-place box girders according to claim 1, characterized in that: The rolling assembly includes a rolling cylinder (3), which is set close to the ground. The rolling cylinder (3) is mounted on the frame via a rolling support rod (31). The rolling support rod (31) is elastically mounted on the frame via an adjusting spring (32). One end of the adjusting spring (32) is connected to the rolling support rod (31), and the other end is mounted on the frame via an adjusting bolt (33). The adjusting bolt (33) controls the elastic tension of the adjusting spring (32) by screwing it in and out.

8. The auxiliary laying device for curing and covering cast-in-place box girders according to claim 1, characterized in that: The edge fixing assembly includes a sewing roller (4), which is set close to the ground. A heating strip (41) is provided on the outer ring of the sewing roller (4). The heating strip (41) is heated by electricity. The sewing roller (4) is elastically installed through a telescopic shaft (411). The heating strip (41) is connected to a heating battery (412) through a wire.

9. The auxiliary laying device for curing and covering cast-in-place box girders according to claim 8, characterized in that: The edge fixing assembly includes a fixing wheel (42) which is set close to the ground. A transition wheel (421) and an installation shaft (422) are installed on one side of the fixing wheel (42). The installation shaft (422) is used to install the suture tape roll. The suture tape is led out from the suture tape roll on the installation shaft (422) and passes around the transition wheel (421) and the fixing wheel (42) in sequence. A hook is provided on one side of the suture tape. The hook includes an elastic pin and a barbed hook. The suture tape is squeezed and pierced through the maintenance covering material by the fixing wheel (42) and then sewn.

10. The auxiliary laying device for curing and covering cast-in-place box girders according to claim 1, characterized in that: The water spraying assembly includes a spray nozzle (5), which is connected to a water tank (53) via a spray pipe (51). The spray pipe (51) is connected in the middle by a T-junction and the spray pipe is divided into two sections. The spray nozzle (5) installed on one spray pipe sprays water toward the bottom surface of the curing covering material, and the spray nozzle (5) installed on the other spray pipe sprays water toward the top surface of the curing covering material. A stop valve (511) is installed on each of the two spray pipes of the spray pipe (51). The spray pipe (51) is connected to the water tank (53) via a water pump (52).

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