Maintenance device and construction method for seam of autoclaved sand aerated concrete slab

Abstract

The invention discloses an autoclaved sand aerated concrete slab joint curing device and construction method.The autoclaved sand aerated concrete slab joint curing device comprises a transportation flat car, a steam curing module and a film covering and pasting module, and the steam curing module is arranged on the transportation flat car and comprises a water tank, a small steam generator and a spray head; the water tank is connected with the small steam generator through a first connecting assembly, the small steam generator is connected with the spray head through a second connecting assembly, the spray head is mounted on a mounting plate, and the film laminating module is arranged on the transportation flat car and comprises a supporting mechanism, a cutting assembly, a pressing assembly and a clamping assembly; the clamping assembly, the pressing assembly and the cutting assembly of the film covering and pasting module cooperate, covering and sealing of a plastic film and a masking tape can be rapidly completed, the coherent operation of steam spraying and film sealing is achieved, and water loss caused by untimely film covering after spraying in traditional manual operation is avoided.

Description

Technical Field

[0001] This invention relates to the field of autoclaved aerated concrete (AAC) panel technology, specifically to a curing device and construction method for joints in autoclaved aerated concrete (AAC) panels. Background Technology

[0002] With the rapid promotion of prefabricated buildings, autoclaved aerated concrete (ALC) panels, with their advantages of being lightweight, heat-insulating, and environmentally friendly, are widely used in the construction of interior and exterior partition walls and infill walls in various buildings. During on-site construction, the treatment of joints after panel splicing is a crucial step in ensuring the integrity and stability of the wall. Joints are typically filled and bonded with special adhesive mortar, and the quality of curing directly determines the strength and durability of the adhesive mortar, thus affecting the long-term performance of the wall.

[0003] Currently, the maintenance of ALC panel joints faces numerous practical challenges. In cold, dry construction sites, the low ambient temperature and short periods of suitable temperature, coupled with insufficient humidity, make traditional water-spraying curing methods difficult to implement. Water sprayed on the joints freezes rapidly, causing freeze-thaw damage to the bonding mortar and hindering its strength development. Conversely, in dry, normal-temperature environments, relying solely on natural curing leads to rapid water loss and shrinkage of the mortar at the joints, resulting in cracking and peeling later on. This is particularly problematic in large public buildings and other applications requiring high wall stability, where such issues can affect seismic performance and even pose safety risks. Furthermore, some construction teams, rushing to meet deadlines, proceed with subsequent wall construction before joint curing is adequate, further increasing the probability of crack formation.

[0004] Current curing methods are mostly decentralized: independent water tanks and spray equipment are used for moisturizing, and sealing is achieved manually by laying plastic film or masking tape. In winter, additional insulation sheds or heating devices are installed. This model has significant drawbacks: the manual operation process is cumbersome, and the processes of spraying, covering, and sealing lack coordination. Often, the film is not covered in time after spraying, resulting in moisture loss, or the film is not tightly adhered, causing steam leakage. The curing equipment lacks flexibility and has poor adaptability to joints of different lengths and locations. Especially in multi-story building construction sites, the decentralized equipment is inconvenient to transport, making it difficult to achieve efficient and continuous curing. The uneven spraying volume and covering pressure controlled manually can easily lead to inconsistent joint curing results. Summary of the Invention

[0005] The purpose of this invention is to provide a curing device and construction method for the joints of autoclaved aerated concrete slabs, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The curing device for the joints of autoclaved aerated concrete (AAC) slabs includes:

[0008] Transport flatbed truck;

[0009] A steam curing module is installed on the transport flatbed truck and includes a water tank, a small steam generator, and a nozzle. The water tank is connected to the small steam generator through a first connecting component, and the small steam generator is connected to the nozzle through a second connecting component. The nozzle is mounted on a mounting plate, and the mounting plate is connected to a first electric push rod, which is used to drive the mounting plate to move.

[0010] A film application module, mounted on the transport flatbed, includes a support mechanism, a cutting component, a pressing component, and a clamping component. The support mechanism is used to hold rolls of masking tape and plastic film. The cutting component is used to cut the masking tape and plastic film. The pressing component is used to press the masking tape or plastic film onto the joint of the concrete slab. The clamping component is used to clamp the starting end of the masking tape or plastic film.

[0011] Preferably, the water tank is provided with a water inlet pipe at the upper end, and a baffle is threadedly connected to the water inlet pipe. A liquid level sensor is installed inside the water tank.

[0012] Preferably, the first connecting assembly includes a first connecting pipe and a water pump, with the two ends of the first connecting pipe connected to a water tank and a small steam generator, respectively, and the water pump connected to the first connecting pipe;

[0013] The second connection assembly includes a second connecting pipe, a telescopic pipe, and a control valve. The two ends of the second connecting pipe are connected to a small steam generator and the telescopic pipe, respectively. The other end of the telescopic pipe is connected to a nozzle. The control valve is installed on the second connecting pipe.

[0014] Preferably, a distance measuring sensor is mounted on the mounting plate, and a cleaning brush is mounted on the mounting plate.

[0015] Preferably, the support mechanism includes a support plate, multiple rotating rollers, and a limiting component. The support plate is fixed to the transport flatbed vehicle, and the rotating rollers are rotatably mounted on the support plate. The rotating rollers for winding masking tape are located on both sides of the rotating rollers for winding plastic film.

[0016] An ultrasonic sensor is installed on the support plate above each of the rollers.

[0017] The limiting assembly includes a limiting plate, a limiting block, two engaging blocks, a return spring, and two levers. The limiting block is fixed to the end of the rotating roller, and the limiting plate is detachably engaged with the limiting block. The limiting block has a moving groove, and the two engaging blocks are slidably disposed in the moving groove. The two levers are respectively connected to the two engaging blocks. The return spring is disposed between the two engaging blocks and provides an elastic force to move them apart. The engaging blocks are engaged with the limiting plate.

[0018] Preferably, the cutting assembly includes a support frame, a lower pressure plate, an electric slide rail, and a cutting blade. The lower pressure plate is fixedly installed on a transport flatbed vehicle, the support frame is fixedly connected to the lower pressure plate, the electric slide rail is installed on the support frame, and the cutting blade is installed on the moving end of the electric slide rail.

[0019] Preferably, the pressing assembly includes a second electric push rod, a first connecting plate, a pressure sensor, a pressing frame, and a pressing roller. The second electric push rod is mounted on a transport flatbed truck, and its output end is connected to the first connecting plate. The pressure sensor is mounted between the first connecting plate and the pressing frame.

[0020] Preferably, the clamping assembly includes a plurality of second connecting plates, an upper clamping plate, a lower clamping plate, a connecting frame, a threaded rod, and a rotating handle. The upper clamping plate is mounted on the transport flatbed vehicle via the second connecting plates. The two ends of the connecting frame pass through the upper clamping plate and are connected to the lower clamping plate. The threaded rod is rotatably connected to the upper clamping plate and is threadedly connected to the connecting frame. The rotating handle is connected to the threaded rod.

[0021] Preferably, the transport flatbed is equipped with a protective cover, and a storage battery is installed inside the protective cover. The transport flatbed is equipped with a pusher, and a controller is installed on the pusher. The controller, storage battery, small steam generator, first electric push rod, liquid level sensor, water pump, control valve, distance sensor, ultrasonic sensor, electric slide rail, second electric push rod and pressure sensor are electrically connected.

[0022] The construction method of the curing device for the joints of autoclaved aerated concrete (AAC) slabs includes the following steps:

[0023] S1. Preparation and Positioning: Move the device to the joint of the autoclaved aerated concrete (AAC) wall to be cured, and operate the equipment through the push frame and controller. Use the distance sensor to adjust the extension and retraction of the first electric push rod so that the distance between the nozzle and the pressing component and the wall surface reaches the preset working range. Release the clamping component, pull out the ends of the plastic film and masking tape, pass them under the cutting component and the pressing component, and then have them clamped and fixed again by the clamping component.

[0024] S2. Synchronous Curing and Covering: Start the water pump, control valve, and small steam generator. Steam is sprayed from the nozzle through the telescopic pipe to humidify and cure the seam area in front. At the same time, the operator pushes the device slowly and evenly along the seam. During the movement, the pressing component, under the feedback of the pressure sensor, presses the plastic film on the steam-moistened seam surface with constant pressure to flatten it. Masking tape is simultaneously pressed onto both edges of the film.

[0025] S3. Fixed-Length Cutting and Finishing: When the curing and covering of a single joint is completed or the material is almost used up, the ultrasonic sensor detects that the remaining material on the roller is too low, or a manual command is issued through the controller. The electric slide rail of the cutting component is activated, driving the cutting blade to move and cut the plastic film and masking tape. The new end is then manually or through the clamping component to re-fix it, and the curing and construction of the next joint section can begin.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. By integrating the steam curing module and the film covering module onto the transport flatbed truck, the integrated and mobile curing operation is realized, which completely changes the situation of scattered equipment and inconvenient transportation in traditional curing. It is especially suitable for the continuous curing needs of joints in different locations on multi-story building construction sites, which greatly improves construction flexibility and work efficiency. There is no need for manual handling of various equipment such as spraying and film covering, which reduces the cumbersome process of on-site equipment scheduling.

[0028] 2. The first electric push rod drives the nozzle to move precisely, and the spraying distance and range can be flexibly adjusted according to the joint position to ensure that the steam evenly wets the joint area. At the same time, the clamping, pressing and cutting components of the film covering module work together to quickly complete the covering and sealing of plastic film and masking tape, realizing a continuous operation of "steam spraying-film sealing". This avoids the moisture loss caused by untimely film covering after spraying and the steam leakage caused by poor film adhesion in traditional manual operation. It effectively ensures the stability and consistency of joint curing and significantly improves the strength formation effect of bonding mortar.

[0029] 3. This invention eliminates the need for manual labor to complete multiple processes such as spraying, film covering, and edge sealing. By coordinating the operations between modules, it reduces manual intervention, thereby lowering the intensity of manual labor and avoiding problems such as uneven spraying volume and inconsistent film covering pressure that occur during manual operation. This ensures the standardized implementation of maintenance operations, effectively avoids quality hazards such as joint cracking and peeling caused by improper maintenance, and guarantees the integrity and long-term performance of the wall. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0032] Figure 3 This is a schematic diagram of the cross-sectional structure of the connecting frame;

[0033] Figure 4 This is a schematic diagram of the cross-sectional structure of the rotating roller;

[0034] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0035] In the diagram: 1. Transport flatbed truck; 2. Water tank; 3. Small steam generator; 4. Nozzle; 5. First electric push rod; 6. Mounting plate; 7. Water inlet pipe; 8. Cover; 9. Liquid level sensor; 10. First connecting pipe; 11. Water pump; 12. Second connecting pipe; 13. Telescopic pipe; 14. Control valve; 15. Distance sensor; 16. Cleaning brush; 17. Support plate; 18. Rotating roller; 19. Ultrasonic sensor; 20. Limiting plate; 21. Limiting block; 22. Engaging block; 23. Return spring; 24. Paddle plate; 25. Moving groove; 26. Support frame; 27. Lower pressure plate; 28. Electric slide rail; 29. ​​Cutting blade; 30. Second electric push rod; 31. First connecting plate; 32. Pressure sensor; 33. Lower pressure frame; 34. Lower pressure roller; 35. Second connecting plate; 36. Upper clamping plate; 37. Lower clamping plate; 38. Connecting frame; 39. Threaded rod; 40. Rotary handle; 41. Protective cover; 42. Battery; 43. Push frame; 44. Controller. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] Please see Figures 1-5 The curing device for the joints of autoclaved aerated concrete (AAC) slabs includes:

[0039] Transport flatbed truck 1;

[0040] A steam curing module, mounted on a transport flatbed trolley 1, includes a water tank 2, a small steam generator 3, and nozzles 4. The water tank 2 has an inlet pipe 7 at its upper end, with a threaded cover 8 connected to it. A liquid level sensor 9 is installed inside the water tank 2. The water tank 2 is connected to the small steam generator 3 via a first connecting assembly. The first connecting assembly includes a first connecting pipe 10 and a water pump 11. The first connecting pipe 10 is connected at both ends to the water tank 2 and the small steam generator 3, respectively. The water pump 11 is connected to the first connecting pipe 10. The small steam generator 3... The nozzle 4 is connected to the second connecting assembly, which includes a second connecting pipe 12, a telescopic pipe 13, and a control valve 14. The two ends of the second connecting pipe 12 are connected to the small steam generator 3 and the telescopic pipe 13, respectively. The other end of the telescopic pipe 13 is connected to the nozzle 4. The control valve 14 is installed on the second connecting pipe 12. The nozzle 4 is installed on the mounting plate 6. The mounting plate 6 is connected to a first electric push rod 5, which is used to drive the mounting plate 6 to move. A distance sensor 15 is installed on the mounting plate 6, and a cleaning brush 16 is installed on the mounting plate 6.

[0041] After the device is started, the controller 44 first activates the distance sensor 15 to detect the distance between the nozzle 4 and the joint surface and sends a feedback signal. The first electric push rod 5 then drives the mounting plate 6 to move, which in turn moves the nozzle 4 and the cleaning brush 16 to the appropriate position. The cleaning brush 16 first cleans the surface around the joint of the autoclaved aerated concrete slab to remove dust and impurities, creating a clean environment for subsequent maintenance. At the same time, the liquid level sensor 9 in the water tank 2 monitors the water level in real time. If the water level is lower than the preset value, the controller 44 will issue a reminder in time. If the water level is normal, the water pump 11 will be started, and water will be transported to the small steam generator 3 through the first connecting pipe 10. After the generator heats and produces steam, the controller 44 opens the control valve 14 on the second connecting pipe 12, and the steam is transported to the nozzle 4 through the telescopic pipe 13. This seamless "distance measurement-positioning-cleaning-steam preparation" process benefits from the coordinated structure of the distance sensor 15 and the first electric push rod 5. The first electric push rod 5 drives the nozzle 4 to move precisely, and the spraying distance and range can be flexibly adjusted according to the joint position to ensure that the steam evenly wets the joint area. Combined with the preset design of the cleaning brush 16, the steam spraying is precise and clean, avoiding impurities from affecting the bonding effect. This solves the problems of inaccurate distance, uneven spraying, and uncleaned surface impurities in traditional manual spraying, ensuring the quality of maintenance from the source.

[0042] The film application module is mounted on the transport flatbed 1 and includes a support mechanism, a cutting component, a pressing component, and a clamping component. The support mechanism is used to hold the roll of masking tape and plastic film. The cutting component is used to cut the masking tape and plastic film. The pressing component is used to press the masking tape or plastic film onto the joint of the autoclaved aerated concrete slab. The clamping component is used to clamp the starting end of the masking tape or plastic film.

[0043] Specifically, the support mechanism includes a support plate 17, multiple rotating rollers 18, and a limiting component. The support plate 17 is fixed on the transport flatbed 1, and the rotating rollers 18 are rotatably mounted on the support plate 17. The rotating rollers 18 for winding masking tape are located on both sides of the rotating rollers 18 for winding plastic film.

[0044] An ultrasonic sensor 19 is installed on the support plate 17 above each roller 18.

[0045] The limiting assembly includes a limiting plate 20, a limiting block 21, two engaging blocks 22, a return spring 23, and two levers 24. The limiting block 21 is fixed to the end of the rotating roller 18. The limiting plate 20 is detachably engaged with the limiting block 21. The limiting block 21 has a moving groove 25. The two engaging blocks 22 are slidably disposed in the moving groove 25. The two levers 24 are respectively connected to the two engaging blocks 22. The return spring 23 is disposed between the two engaging blocks 22 and provides elastic force to move them apart. The engaging blocks 22 are engaged with the limiting plate 20.

[0046] Before operation, open the water inlet pipe 7 of water tank 2, fill with clean water and tighten it. Move the locking block 22 of the limiting component by using the lever 24 to compress the return spring 23. Place the roll of plastic film and masking tape on the corresponding rollers 18 respectively. After releasing the lever 24, the locking block 22 will reset under the action of the return spring 23. Then, lock the limiting plate 20 onto the limiting block 21 at the end of the roller 18. The locking block 22 and the limiting plate 20 form a stable lock, completing the quick limiting installation of the roll material. At the same time, the controller 44 presets the maintenance parameters and pushes the pusher 43 to move the device to the joint area to be maintained. The battery 42 provides power support for the whole process. During this process, the limiting component and the ultrasonic sensor 19 on the support plate 17 work together. The ultrasonic sensor 19 monitors the remaining amount of the roll material on the roller 18 in real time. When the remaining amount is insufficient, it sends a warning signal to the controller 44. The operator can quickly release the jamming and replace the roll material through the lever 24. This completely solves the problem of cumbersome installation of traditional roll material and difficulty in controlling the remaining amount, which leads to work interruption and significantly improves the continuity of work.

[0047] The cutting assembly includes a support frame 26, a lower pressure plate 27, an electric slide rail 28, and a cutting blade 29. The lower pressure plate 27 is fixedly installed on the transport flatbed 1, the support frame 26 is fixedly connected to the lower pressure plate 27, the electric slide rail 28 is installed on the support frame 26, and the cutting blade 29 is installed on the moving end of the electric slide rail 28.

[0048] Once the seam area is covered, the controller 44 activates the electric slide rail 28 of the cutting component, driving the cutting blade 29 to precisely cut the plastic film and masking tape. After the steam spraying reaches the preset time, the controller 44 sequentially shuts off the small steam generator 3, water pump 11, and control valve 14. The first electric push rod 5 drives the mounting plate 6 to reset, allowing the operator to move the device to the next seam area for repeated work. Throughout the process, the controller 44 coordinates all actions, including cleaning, spraying, covering, compaction, and cutting, forming an automated closed-loop operation. This reduces manual intervention and solves the problems of high labor intensity, large operational errors, and inconsistent maintenance results associated with traditional manual operations. Furthermore, the linkage between the pressure sensor 32 and the pressing component ensures the compaction of the covering, preventing steam leakage and effectively avoiding quality hazards such as seam cracking and detachment, thus guaranteeing the integrity and long-term performance of the wall.

[0049] The pressing assembly includes a second electric push rod 30, a first connecting plate 31, a pressure sensor 32, a pressing frame 33, and a pressing roller 34. The second electric push rod 30 is mounted on the transport flatbed 1, and the output end of the second electric push rod 30 is connected to the first connecting plate 31. The pressure sensor 32 is mounted between the first connecting plate 31 and the pressing frame 33.

[0050] The clamping assembly includes several second connecting plates 35, an upper clamping plate 36, a lower clamping plate 37, a connecting frame 38, a threaded rod 39, and a rotating handle 40. The upper clamping plate 36 is mounted on the transport flatbed 1 through the second connecting plates 35. The two ends of the connecting frame 38 pass through the upper clamping plate 36 and are connected to the lower clamping plate 37. The threaded rod 39 is rotatably connected to the upper clamping plate 36 and is threadedly connected to the connecting frame 38. The rotating handle 40 is connected to the threaded rod 39.

[0051] After the steam spray is started, the nozzle 4 sprays steam evenly into the joint area, providing a suitable temperature and humidity environment for the bonding mortar. At the same time, the film covering module operates synchronously. The rotating handle 40 of the clamping component rotates, driving the threaded rod 39 to rotate, which drives the connecting frame 38 to move down so that the lower clamping plate 37 cooperates with the upper clamping plate 36 to accurately clamp the starting end of the plastic film. The second electric push rod 30 pushes the first connecting plate 31, the lower pressure frame 33 and the lower pressure roller 34 to move down. During the pressing process, the pressure sensor 32 monitors the pressure in real time and feeds it back to the controller 44. The controller 44 adjusts the output force of the electric push rod to ensure that the lower pressure roller 34 evenly presses the plastic film into the joint area, with a tight fit and no air bubbles. The lower pressure roller 34 can also press down the plastic film and masking tape at the same time, with the masking tape pasted on both sides of the plastic film. As the device moves slowly, the plastic film is continuously released from the rotating roller 18, simultaneously covering the area sprayed with steam. When edge sealing is required, the clamping component switches to clamp the starting end of the masking tape, and the lower pressure roller 34 simultaneously presses the tape onto the edge of the film to complete the seal. This synchronous collaboration between the steam curing module and the film covering module achieves a seamless connection between "moisturizing and sealing," avoiding the problems of steam loss and rapid moisture evaporation caused by untimely film covering after traditional spraying. It significantly improves the hydration reaction efficiency of the bonding mortar, achieving a curing effect that exceeds the expectations of those skilled in the art.

[0052] In the above embodiment, a protective cover 41 is installed on the transport flatbed 1, and a storage battery 42 is installed inside the protective cover 41. A pusher 43 is installed on the transport flatbed 1, and a controller 44 is installed on the pusher 43. The controller 44, the storage battery 42, the small steam generator 3, the first electric push rod 5, the liquid level sensor 9, the water pump 11, the control valve 14, the distance sensor 15, the ultrasonic sensor 19, the electric slide rail 28, the second electric push rod 30, and the pressure sensor 32 are electrically connected.

[0053] Example 2

[0054] The construction method of the curing device for the joints of autoclaved aerated concrete (AAC) slabs includes the following steps:

[0055] S1. Preparation and Positioning: Move the device to the joint of the autoclaved aerated concrete (AAC) wall to be cured, and operate the equipment via the pusher 43 and controller 44. Use the distance sensor 15 to adjust the extension and retraction of the first electric push rod 5 so that the distance between the nozzle 4 and the pressing component and the wall surface reaches the preset working range. Release the clamping component, pull out the ends of the plastic film and masking tape, pass them under the cutting component and the pressing component, and then have them clamped and fixed again by the clamping component.

[0056] S2. Synchronous Curing and Covering: Start the water pump 11, control valve 14, and small steam generator 3. Steam is sprayed from the nozzle 4 through the telescopic pipe 13 to humidify and cure the seam area in front. At the same time, the operator pushes the device slowly and evenly along the seam. During the movement, the pressing component, under the feedback of the pressure sensor 32, presses the plastic film on the seam surface that has been moistened by steam with constant pressure to flatten it. Masking tape is simultaneously pressed onto both sides of the film edge.

[0057] S3. Fixed-Length Cutting and Finishing: When the curing and covering of a single joint is completed or the material is almost used up, the ultrasonic sensor 19 detects that the remaining material on the rotating roller 18 is too low, or a manual instruction is issued through the controller 44. The electric slide rail 28 of the cutting assembly is activated, driving the cutting blade 29 to move and cut the plastic film and masking tape. The new end is then manually or through the clamping assembly to re-fix it, and the curing and construction of the next joint section can begin.

[0058] It should be noted that the specific models and specifications of the controller 44, battery 42, small steam generator 3, first electric push rod 5, liquid level sensor 9, water pump 11, control valve 14, distance sensor 15, ultrasonic sensor 19, electric slide rail 28, second electric push rod 30 and pressure sensor 32 need to be selected and determined according to the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

Claims

1. A curing device for joints of autoclaved aerated concrete (AAC) slabs, comprising a transport flatbed truck (1), characterized in that, Also includes: A steam curing module is installed on the transport flatbed (1) and includes a water tank (2), a small steam generator (3), and a nozzle (4). The water tank (2) is connected to the small steam generator (3) through a first connecting component. The small steam generator (3) is connected to the nozzle (4) through a second connecting component. The nozzle (4) is mounted on a mounting plate (6). The mounting plate (6) is connected to a first electric push rod (5). The first electric push rod (5) is used to drive the mounting plate (6) to move. A film covering module is mounted on the transport flatbed (1) and includes a support mechanism, a cutting component, a pressing component, and a clamping component. The support mechanism is used to place rolls of masking tape and plastic film. The cutting component is used to cut the masking tape and plastic film. The pressing component is used to press the masking tape or plastic film onto the joint of the concrete slab. The clamping component is used to clamp the starting end of the masking tape or plastic film.

2. The curing device for the joints of autoclaved aerated concrete slabs according to claim 1, characterized in that: The water tank (2) is provided with an inlet pipe (7) at the upper end, and a baffle (8) is threaded onto the inlet pipe (7). A liquid level sensor (9) is installed inside the water tank (2).

3. The curing device for the joints of autoclaved aerated concrete slabs according to claim 2, characterized in that: The first connecting assembly includes a first connecting pipe (10) and a water pump (11). The two ends of the first connecting pipe (10) are respectively connected to a water tank (2) and a small steam generator (3), and the water pump (11) is connected to the first connecting pipe (10). The second connection assembly includes a second connecting pipe (12), a telescopic pipe (13), and a control valve (14). The two ends of the second connecting pipe (12) are connected to a small steam generator (3) and the telescopic pipe (13) respectively. The other end of the telescopic pipe (13) is connected to a nozzle (4). The control valve (14) is installed on the second connecting pipe (12).

4. The curing device for the joints of autoclaved aerated concrete slabs according to claim 3, characterized in that: A distance sensor (15) is mounted on the mounting plate (6), and a cleaning brush (16) is mounted on the mounting plate (6).

5. The curing device for the joints of autoclaved aerated concrete slabs according to claim 4, characterized in that: The support mechanism includes a support plate (17), multiple rotating rollers (18) and a limiting component. The support plate (17) is fixed on the transport flatbed (1). The rotating rollers (18) are rotatably mounted on the support plate (17). The rotating rollers (18) for winding masking tape are located on both sides of the rotating rollers (18) for winding plastic film. An ultrasonic sensor (19) is installed on the support plate (17) above each of the rollers (18); The limiting assembly includes a limiting plate (20), a limiting block (21), two engaging blocks (22), a return spring (23), and two levers (24). The limiting block (21) is fixed to the end of the rotating roller (18). The limiting plate (20) is detachably engaged with the limiting block (21). The limiting block (21) has a moving groove (25). The two engaging blocks (22) are slidably disposed in the moving groove (25). The two levers (24) are respectively connected to the two engaging blocks (22). The return spring (23) is disposed between the two engaging blocks (22) and provides elastic force to move them apart. The engaging blocks (22) are engaged with the limiting plate (20).

6. The curing device for the joints of autoclaved aerated concrete slabs according to claim 5, characterized in that: The cutting assembly includes a support frame (26), a lower pressure plate (27), an electric slide rail (28), and a cutting blade (29). The lower pressure plate (27) is fixedly installed on the transport flatbed (1). The support frame (26) is fixedly connected to the lower pressure plate (27). The electric slide rail (28) is installed on the support frame (26), and the cutting blade (29) is installed on the moving end of the electric slide rail (28).

7. The curing device for joints of autoclaved aerated concrete slabs according to claim 6, characterized in that: The pressing assembly includes a second electric push rod (30), a first connecting plate (31), a pressure sensor (32), a pressing frame (33), and a pressing roller (34). The second electric push rod (30) is mounted on the transport flatbed (1), and the output end of the second electric push rod (30) is connected to the first connecting plate (31). The pressure sensor (32) is mounted between the first connecting plate (31) and the pressing frame (33).

8. The curing device for the joints of autoclaved aerated concrete slabs according to claim 1, characterized in that: The clamping assembly includes several second connecting plates (35), an upper clamping plate (36), a lower clamping plate (37), a connecting frame (38), a threaded rod (39), and a rotating handle (40). The upper clamping plate (36) is mounted on the transport flatbed (1) through the second connecting plates (35). The connecting frame (38) passes through the upper clamping plate (36) and is connected to the lower clamping plate (37) at both ends. The threaded rod (39) is rotatably connected to the upper clamping plate (36) and is threadedly connected to the connecting frame (38). The rotating handle (40) is connected to the threaded rod (39).

9. The curing device for the joints of autoclaved aerated concrete slabs according to claim 7, characterized in that: The transport flatbed (1) is equipped with a protective cover (41), and a storage battery (42) is installed inside the protective cover (41). The transport flatbed (1) is equipped with a pusher (43), and a controller (44) is installed on the pusher (43). The controller (44), the storage battery (42), the small steam generator (3), the first electric push rod (5), the liquid level sensor (9), the water pump (11), the control valve (14), the distance sensor (15), the ultrasonic sensor (19), the electric slide rail (28), the second electric push rod (30), and the pressure sensor (32) are electrically connected.

10. A construction method for the curing device for the joints of autoclaved aerated concrete slabs according to any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Preparation and Positioning: Move the device to the joint of the autoclaved aerated concrete (AAC) wall to be cured, and operate the device through the pusher (43) and controller (44). Use the distance sensor (15) to adjust the extension and retraction of the first electric push rod (5) so that the distance between the nozzle (4) and the pressing component and the wall reaches the preset working range. Release the clamping component, pull out the ends of the plastic film and masking tape, pass them under the cutting component and the pressing component, and then re-clamp and fix them by the clamping component. S2. Synchronous Curing and Covering: Start the water pump (11), control valve (14) and small steam generator (3). Steam is sprayed from the nozzle (4) through the telescopic pipe (13) to humidify and cure the seam area in front. At the same time, the operator pushes the device to move slowly and evenly along the seam. During the movement, the pressing component, under the feedback of the pressure sensor (32), presses the plastic film on the seam surface that has been moistened by steam with constant pressure and flattens it. Masking tape is simultaneously pressed onto the two edges of the film. S3. Fixed-length cutting and finishing: When the single-section seam curing and covering is completed or the material is about to be used up, the ultrasonic sensor (19) detects that the material remaining on the roller (18) is too low or the manual controller (44) issues an instruction, the electric slide rail (28) of the cutting component is started, driving the cutting blade (29) to move and cut the plastic film and masking tape.

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