A flexible adjustable curing device for cast-in-place box girders

Abstract

This utility model relates to the field of curing equipment technology, and in particular to a flexible adjustable curing equipment for cast-in-place box girders. It includes a curing tank, a trolley, a temperature control mechanism, a closed cover, corrugated expansion pipes, and a spraying mechanism. The curing tank has a temperature control mechanism inside, a movable trolley is located below the tank, and a closed cover is located above it. A water inlet bend is located at the center of one side of the closed cover. One end of the bend extends through the closed cover into the temperature control tank, and the other end is connected to a flexible hose. Multiple sets of corrugated expansion pipes are located at the end of the hose furthest from the bend, and multiple spraying mechanisms are located between these pipes. This utility model enables flexible adjustment of the water temperature according to different seasons and ambient temperatures through the temperature control mechanism, completely solving the problem of traditional equipment relying on natural water temperature, which leads to slow concrete hydration and even freezing in winter due to excessively low water temperatures.

Description

Technical Field

[0001] This utility model relates to the field of maintenance equipment technology, and in particular to a flexible adjustable maintenance equipment for cast-in-place box girders. Background Technology

[0002] Cast-in-place box girders are beams fabricated on-site using materials such as formwork and reinforced concrete. The columns, slabs, and beams are combined to form a "box"-shaped component. After the cast-in-place box girder is poured, appropriate curing equipment is required to maintain its shape.

[0003] Traditional cast-in-place box girder curing equipment relies on natural water temperature during curing. In winter, excessively low water temperatures can slow down the hydration reaction of concrete and may even cause the concrete to freeze, affecting its strength and durability. At the same time, natural water temperature fluctuates with changes in ambient temperature, making it difficult to precisely control within the optimal temperature range required for concrete curing.

[0004] Therefore, in order to address the shortcomings of the traditional cast-in-place box girder curing equipment, a flexible and adjustable cast-in-place box girder curing equipment can be designed. By integrating a temperature regulating structure into the curing box, the water temperature can be flexibly adjusted according to different seasons, thereby facilitating the solution of the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of traditional cast-in-place box girder curing equipment, which usually relies on natural water temperature and cannot be flexibly adjusted during curing, this utility model provides a cast-in-place box girder curing equipment that can be flexibly adjusted.

[0006] The technical solution is as follows: A flexible adjustable cast-in-place box girder curing equipment includes a curing tank, a trolley, a temperature control mechanism, a sealing cover, corrugated expansion pipes, and a spraying mechanism. The curing tank has a temperature control mechanism inside for adjusting the water temperature. A trolley for easy movement is located below the curing tank. A sealing cover for closing the curing tank is located above the curing tank. A water inlet bend is located at the center of one side of the sealing cover. One end of the water inlet bend extends through the sealing cover into the temperature control water chamber. The other end of the water inlet bend is connected to a flexible hose. Multiple sets of corrugated expansion pipes that can extend and retract according to the box girder size are located at the end of the connecting hose away from the water inlet bend. Multiple spraying mechanisms for curing the box girder are located between the sets of corrugated expansion pipes.

[0007] Furthermore, the temperature control mechanism includes a power connector located at the bottom of one side of the outer end of the curing box. The power connector has a power inlet on its surface and a curved heating tube at its rear end, which extends into the interior of the temperature-controlled water chamber.

[0008] Furthermore, the front bottom of the maintenance box has an embedded groove, in which a battery pack is fitted and installed. The battery pack is electrically connected to the power connector. A control panel is located on the front top of the maintenance box, and the control panel is electrically connected to the battery pack.

[0009] Furthermore, a temperature probe is provided at the rear of the control console, extending into the interior of the temperature-regulating water tank, and is electrically connected to the control console.

[0010] Furthermore, a water pump is installed at the bottom of the temperature-regulating water tank on the side away from the temperature-regulating mechanism. A water supply pipe is installed above the water pump. The lower end of the water supply pipe is connected to the water pump, and the upper end of the water supply pipe is connected to the end of the water supply elbow away from the connecting hose.

[0011] Furthermore, a water injection connector is provided above the outer end of the curing box on the side away from the temperature control mechanism, and a cover plate fixing groove is provided on the top of the temperature control water tank to accommodate the sealing cover plate.

[0012] Furthermore, the spraying mechanism includes a connecting pipe, with a first connector at both ends of the connecting pipe, and a second connector at both ends of the corrugated telescopic pipe corresponding to the first connector, with the first connector and the second connector matching and engaging.

[0013] Furthermore, a diversion pipe is provided in the middle section of the connecting pipe, one end of which is connected to the connecting pipe, and the other end of which is provided with a nozzle.

[0014] The beneficial effects are that, compared to the shortcomings of traditional cast-in-place box girder curing equipment, this application, through its temperature-regulating mechanism, can flexibly adjust the water temperature according to different seasons and ambient temperatures. This completely solves the problem of traditional equipment relying on natural water temperature, which leads to slow concrete hydration and even freezing in winter due to excessively low water temperatures. This effectively ensures the strength and durability of the concrete, improves the quality of the box girder, and greatly enhances the flexibility and convenience of the equipment. The battery pack allows it to operate normally at construction sites without external power, expanding the equipment's application range. The trolley design facilitates equipment movement and allows for rapid deployment. The spraying mechanism can be deployed to different maintenance locations. It is connected by the first and second joints and can be flexibly adjusted according to the size and shape of the box girder to meet diverse maintenance needs. The water temperature is monitored in real time by a temperature probe and the data is fed back, so as to achieve precise control of the water temperature. The corrugated expansion tube can be freely extended and retracted according to the size of the box girder, so as to accurately fit the box girder of different specifications and avoid maintenance blind spots caused by size mismatch. This greatly improves the adaptability of the equipment to the maintenance of diverse box girders. When not in use, the corrugated expansion tube can be retracted and folded to reduce the space occupied and facilitate the storage and transportation of the equipment. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the adjustable cast-in-place box girder curing equipment of this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the combination of the maintenance box and control console of this utility model;

[0017] Figure 3 This is a three-dimensional structural diagram of the combination of the curing box and the temperature control mechanism of this utility model;

[0018] Figure 4 This is a three-dimensional structural diagram of the combination of the closed cover plate and the water conveying elbow of this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the combination of the corrugated expansion tube and the second connector of this utility model.

[0020] Figure 6 This is a three-dimensional structural diagram of the spraying mechanism of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Curing box; 101. Temperature-regulating water tank; 102. Cover plate fixing groove; 2. Trolley; 3. Temperature regulation mechanism; 301. Power connector; 302. Power port; 303. Curved heating tube; 4. Control console; 5. Enclosed cover plate; 6. Corrugated telescopic tube; 7. Spraying mechanism; 701. Connecting pipe; 702. Second connector; 703. Diverter pipe; 704. Sprayer head; 8. Embedded groove; 9. Battery pack; 10. Temperature probe; 11. Water pump; 12. Water injection connector; 13. Water supply pipe; 14. Water supply elbow; 15. Connecting hose; 16. First connector. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0023] The box girder's box section consists of a top plate, a bottom plate, and a web, forming a closed box structure. This unique structure gives it excellent torsional resistance, effectively resisting the torsional force generated during vehicle travel and ensuring the stability of the bridge structure. At the same time, the box section provides a large bending moment of inertia, enabling the girder to exhibit excellent load-bearing capacity when subjected to vertical loads, meeting the ever-increasing load demands of modern transportation.

[0024] Compared with precast beams, the biggest advantage of cast-in-place box girders lies in their high adaptability. They can flexibly adjust the size and shape of the beam according to different terrains, route directions, and bridge spans. In complex urban environments, cast-in-place box girders can cleverly bypass existing buildings and underground pipelines, achieving harmonious integration of bridges with urban spaces. In the construction of long-span bridges, the cast-in-place process can ensure the continuity and integrity of the beam, avoid the joint problems caused by splicing precast beams, and improve the service life and safety of the bridge.

[0025] The strength gain of concrete originates from the hydration reaction of cement, a process that requires suitable temperature and humidity conditions. In the initial stage after pouring, cement reacts rapidly with water, generating heat of hydration and gradually hardening. If the ambient humidity is insufficient, the surface moisture of the concrete will evaporate quickly, leading to incomplete cement hydration. This not only prevents normal strength gain but also generates drying shrinkage stress due to moisture loss, causing surface cracks. At the same time, excessively low temperatures will slow down the hydration reaction, while excessively high temperatures may cause excessive evaporation of internal moisture and excessive temperature stress, which also threatens the quality of the beam. Therefore, the core objective of cast-in-place box girder curing is to create a stable and suitable temperature and humidity environment for the concrete through human intervention, ensuring the smooth progress of the hydration reaction and enhancing the density and durability of the beam.

[0026] The strength gain of concrete originates from the hydration reaction of cement, a process that requires suitable temperature and humidity conditions. In the initial stage after pouring, cement reacts rapidly with water, generating heat of hydration and gradually hardening. If the ambient humidity is insufficient, the surface moisture of the concrete will evaporate quickly, leading to incomplete cement hydration. This not only prevents normal strength gain but also generates drying shrinkage stress due to moisture loss, causing surface cracks. At the same time, excessively low temperatures will slow down the hydration reaction, while excessively high temperatures may cause excessive evaporation of internal moisture and excessive temperature stress, which also threatens the quality of the beam. Therefore, the core objective of cast-in-place box girder curing is to create a stable and suitable temperature and humidity environment for the concrete through human intervention, ensuring the smooth progress of the hydration reaction and enhancing the density and durability of the beam.

[0027] Water spraying is the most traditional and commonly used curing method. After the concrete is poured and initially set (generally 2-6 hours after pouring, depending on the site temperature and cement properties), the surface of the beam is sprayed with clean water. The frequency of watering needs to be adjusted flexibly according to the ambient temperature, humidity and wind speed. Usually, when the temperature is high and the air is dry, water is sprayed once every 1-2 hours; when the temperature is low or the humidity is high, it can be extended to once every 3-4 hours. To ensure that all parts of the beam are fully moistened, a manual water pipe or an automatic sprinkler system should be used for comprehensive watering, paying special attention to easily dry parts such as the web and flanges. During the water spraying curing process, the concrete surface should be kept moist at all times, and the curing time should not be less than 7 days. For large-volume concrete or parts with special requirements, the curing time can be extended to 14 days or even longer.

[0028] Example

[0029] like Figures 1-6As shown, a flexible adjustable cast-in-place box girder curing equipment includes a curing tank 1, a trolley 2, a temperature regulating mechanism 3, a sealing cover 5, corrugated expansion pipes 6, and a spraying mechanism 7. The curing tank has a temperature regulating mechanism 3 for adjusting the water temperature inside. A trolley 2 is located below the curing tank for easy movement. A sealing cover 5 is located above the curing tank for sealing it. A water supply elbow 14 is located at the center of one side of the sealing cover 5. One end of the water supply elbow 14 extends through the sealing cover 5 into the temperature regulating water chamber 101. The other end of the water supply elbow 14 is connected to a flexible hose 15. Multiple sets of corrugated expansion pipes 6, which can extend and retract according to the box girder size, are located at the ends of the connecting hoses 15 away from the water supply elbow 14. Multiple sets of spraying mechanisms 7 for curing the box girder are located between the multiple sets of corrugated expansion pipes 6.

[0030] The temperature control mechanism 3 includes a power connector 301, which is located at the bottom of the outer side of the curing box 1. The power connector 301 has a power inlet 302 on its surface. A curved heating tube 303 is provided at the rear end of the power connector 301. The curved heating tube 303 extends into the interior of the temperature control water tank 101. An external power source is connected through the power connector 301 to provide power to the curved heating tube 303. The curved heating tube 303 can heat the water in the temperature control water tank 101, thereby achieving water temperature regulation.

[0031] The front bottom of the maintenance box 1 has an embedded groove 8, in which a battery pack 9 is fitted and installed. The battery pack 9 is electrically connected to the power connector 301. The front top of the maintenance box 1 has a control console 4, which is electrically connected to the battery pack 9. The battery pack 9 can power the equipment without an external power source, improving the flexibility and convenience of the equipment. The control console 4 allows operators to easily control the equipment.

[0032] The rear end of the control console 4 is equipped with a temperature probe 10, which extends into the interior of the temperature-regulating water tank 101. The temperature probe 10 is electrically connected to the control console 4. The temperature probe 10 monitors the water temperature in the temperature-regulating water tank 101 in real time and feeds the temperature data back to the control console 4.

[0033] A water pump 11 is installed at the bottom of the temperature-regulating water tank 101 on the side away from the temperature-regulating mechanism 3. A water supply pipe 13 is installed above the water pump 11. The lower end of the water supply pipe 13 is connected to the water pump 11, and the upper end of the water supply pipe 13 is connected to the end of the water supply elbow 14 away from the connecting hose 15. The water pump 11 can transport the water in the temperature-regulating water tank 101 to the water supply elbow 14 through the water supply pipe 13, and then to the spraying mechanism 7 through the connecting hose 15 and the corrugated expansion pipe 6 to achieve spraying maintenance of the box girder.

[0034] A water inlet connector 12 is provided on the upper outer end of the curing chamber 1 away from the temperature control mechanism 3. The top of the temperature control water tank 101 is provided with a cover plate fixing groove 102 to accommodate the sealing cover plate 5. Water can be easily added to the temperature control water tank 101 through the water inlet connector 12 to ensure that there is enough water in the temperature control water tank 101 for curing. The cover plate fixing groove 102 can make the sealing cover plate 5 fit better with the temperature control water tank 101, play a sealing role, and reduce heat loss.

[0035] The spraying mechanism 7 includes a connecting pipe 701, with a first connector 16 at both ends of the connecting pipe 701 and a second connector 702 at both ends of the corrugated expansion pipe 6 corresponding to the first connector 16. The first connector 16 and the second connector 702 are matched and engaged. The connecting pipe 701 and the corrugated expansion pipe 6 are connected by the first connector 16 and the second connector 702, which makes the installation and disassembly of the spraying mechanism 7 more convenient and allows for flexible adjustment of the position and length of the corrugated expansion pipe 6 according to the size and shape of the box girder.

[0036] A diversion pipe 703 is provided in the middle section of the connecting pipe 701. One end of the diversion pipe 703 is connected to the connecting pipe 701, and the other end of the diversion pipe 703 is provided with a nozzle 704. The water in the connecting pipe 701 can be diverted through the diversion pipe 703 and the nozzle 704 and sprayed out through the nozzle 704, so that the water can be sprayed more evenly on the box girder, improving the uniformity of spraying and the curing effect.

[0037] After the cast-in-place box girder is poured, push the trolley 2 of this curing equipment to a suitable position next to the box girder. Add sufficient water to the temperature-regulating water tank 101 of the curing box 1 through the water injection connector 12 to ensure that there is enough water for curing.

[0038] When water temperature adjustment is required, especially in winter or when a higher water temperature is needed, connect the power connector 301 to an external power source and turn on the curved heating tube 303 via the control console 4 to begin heating the water in the temperature-regulating water tank 101. If there is no external power source on site, the battery pack 9 can be used directly for power supply, and the equipment can be controlled via the control console 4. During the heating process, the temperature probe 10 monitors the water temperature in the temperature-regulating water tank 101 in real time and feeds the temperature data back to the control console 4. The operator can flexibly adjust the working status of the curved heating tube 303 based on the temperature information displayed on the control console 4 until the water temperature reaches the optimal temperature required for concrete curing.

[0039] According to the size and shape of the box girder, the corrugated expansion pipe 6 is flexibly assembled with the connecting pipe 701 through the first joint 16 and the second joint 702. The corrugated expansion pipe 6 can freely expand and contract according to the size of the box girder, and can accurately fit box girders of different specifications. The position and length of the spraying mechanism 7 are adjusted so that it can fully cover the surface of the box girder. Then, the water pump 11 is started through the control console 4. The water pump 11 delivers water with the temperature adjusted in the temperature-controlled water tank 101 to the water supply elbow 14 through the water supply pipe 13, and then through the connecting hose 15 and the corrugated expansion pipe 6 to the spraying mechanism 7. Finally, the water is evenly sprayed onto the box girder by the nozzle 704, and the spraying maintenance of the box girder begins.

[0040] Its working principle is as follows: the power connector 301 is connected to an external power source or battery pack 9 to provide power to the curved heating tube 303. The curved heating tube 303 heats the water in the temperature-regulating water tank 101 through heat transfer to achieve water temperature regulation. The temperature probe 10 monitors the water temperature in real time and feeds the data back to the control console 4. The operator controls the curved heating tube 303 according to the data to form a closed-loop water temperature regulation system to ensure that the water temperature is maintained within a suitable range. In terms of power transmission, the water pump 11 is started under the control of the control console 4. It uses its own suction and pressure to draw water out of the temperature-regulating water tank 101 and delivers the water to the spray mechanism 7 through the water supply pipe 13, water supply elbow 14, connecting hose 15 and corrugated telescopic pipe 6.

[0041] Its beneficial effects are significant. The temperature control mechanism 3 can flexibly adjust the water temperature according to different seasons and ambient temperatures, completely solving the problem of traditional equipment relying on natural water temperature. In winter, the water temperature is too low, causing the concrete hydration reaction to be slow or even freezing. This effectively ensures the strength and durability of the concrete, improves the quality of the box girder, and greatly enhances the flexibility and convenience of the equipment. The battery pack 9 enables it to work normally at construction sites without external power, expanding the scope of application of the equipment. The trolley 2 is designed to facilitate equipment movement and can be quickly deployed to different maintenance locations. The spraying mechanism 7 is connected by the first joint 16 and the second joint 702, which can be flexibly adjusted according to the size and shape of the box girder to meet diverse maintenance needs. The temperature probe 10 monitors the water temperature in real time and provides feedback data, achieving precise control of the water temperature. The corrugated expansion tube 6 can freely expand and contract according to the size of the box girder, accurately fitting box girders of different specifications, eliminating maintenance blind spots caused by size mismatch, and greatly improving the adaptability of the equipment to diverse box girder maintenance. When not in use, the corrugated expansion tube 6 can be retracted and folded to reduce the space occupied, facilitating the storage and transportation of the equipment.

Claims

1. A flexible adjustable cast-in-place box beam maintenance equipment, comprising a maintenance box (1); characterized in that, It also includes a trolley (2), a temperature control mechanism (3), a sealing cover (5), a corrugated telescopic pipe (6), and a spraying mechanism (7); the interior of the maintenance water tank is provided with a temperature control mechanism (3) for adjusting the water temperature, the bottom of the maintenance water tank is provided with a trolley (2) for easy movement, the top of the maintenance water tank is provided with a sealing cover (5) for sealing the maintenance water tank, a water supply elbow (14) is provided at the center of one side of the surface of the sealing cover (5), one end of the water supply elbow (14) extends through the sealing cover (5) to the interior of the temperature control water tank (101), the other end of the water supply elbow (14) is provided with a connecting hose (15), the end of the connecting hose (15) away from the water supply elbow (14) is provided with multiple sets of corrugated telescopic pipes (6) that can be extended and retracted according to the size of the box girder, and multiple sets of spraying mechanisms (7) for maintaining the box girder are provided between the multiple sets of corrugated telescopic pipes (6).

2. The flexible cast-in-place box girder maintenance device according to claim 1, characterized in that, The temperature control mechanism (3) includes a power connector (301), which is located at the bottom of the outer side of the curing box (1). The surface of the power connector (301) is provided with a power inlet (302), and the rear end of the power connector (301) is provided with a curved heating tube (303), which extends into the interior of the temperature control water tank (101).

3. The flexible adjustable cast-in-place box beam maintenance equipment according to claim 2, characterized in that, The maintenance box (1) has an embedded groove (8) at the bottom of the front end, and a battery pack (9) is installed inside the embedded groove (8). The battery pack (9) is electrically connected to the power connector (301). The maintenance box (1) has a control console (4) at the top of the front end, and the control console (4) is electrically connected to the battery pack (9).

4. The flexible adjustable cast-in-place box beam maintenance device according to claim 3, characterized in that, The rear end of the control panel (4) is provided with a temperature probe (10), which extends into the interior of the temperature-regulating water tank (101) and is electrically connected to the control panel (4).

5. The flexible cast-in-place box girder maintenance device according to claim 1, wherein, A water pump (11) is provided at the bottom of the side of the temperature regulating water tank (101) away from the temperature regulating mechanism (3). A water supply pipe (13) is provided above the water pump (11). The lower end of the water supply pipe (13) is connected to the water pump (11), and the upper end of the water supply pipe (13) is connected to the end of the water supply elbow (14) away from the connecting hose (15).

6. The flexible cast-in-place box girder maintenance device according to claim 1, wherein, A water inlet connector (12) is provided on the upper side of the outer end of the curing box (1) away from the temperature control mechanism (3), and a cover plate fixing groove (102) for accommodating the closed cover plate (5) is provided on the top of the temperature control water tank (101).

7. The flexible cast-in-place box girder maintenance device according to claim 1, characterized in that, The spraying mechanism (7) includes a connecting pipe (701), both ends of the connecting pipe (701) are provided with a first connector (16), and both ends of the corrugated telescopic pipe (6) are provided with a second connector (702) corresponding to the first connector (16), and the first connector (16) and the second connector (702) are matched and engaged.

8. The adjustable cast-in-place box girder curing equipment according to claim 7, characterized in that, The middle section of the connecting pipe (701) is provided with a diversion pipe (703), one end of the diversion pipe (703) is connected to the connecting pipe (701), and the other end of the diversion pipe (703) is provided with a nozzle (704).

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