Assembly type laminated slab cast-in-situ zone hoisting formwork construction device and use method thereof

Abstract

This invention discloses a prefabricated composite slab cast-in-place strip formwork construction device, comprising a load-bearing beam assembly, an adjusting assembly, a supporting assembly, a lifting mechanism, a formwork assembly, and a mold. The load-bearing beam assembly includes two parallel, spaced-apart load-bearing beams, which are adjustablely connected by the adjusting assembly. A supporting assembly, which is adjusted to fit against the top surface of the composite slab, is located at the bottom of each end of the load-bearing beam. A lifting mechanism is located at each end of the load-bearing beam, for a total of four lifting mechanisms on the two load-bearing beams. A formwork assembly connects the four lifting mechanisms. The formwork assembly holds a mold for the composite slab to be cast in place. Multiple vibration components are evenly spaced at the bottom of the formwork assembly. The method of use includes: Step 1, using the handle to move the device to the designated location; Step 2, observing the level. This invention has high construction efficiency and strong versatility and adaptability.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a prefabricated composite slab cast-in-place construction device with suspended formwork and its usage method. Background Technology

[0002] In prefabricated building construction, composite slabs are widely used due to their high degree of industrialization and convenient construction. To ensure reliable connection and structural integrity of composite slabs, cast-in-place strips must be reserved at the joints. These strips are formed by pouring concrete on-site to create an integrated load-bearing system. The construction quality of these cast-in-place strips directly affects the structural safety and performance of the building.

[0003] During cast-in-place strip construction, the pouring area needs to be enclosed by suspended formwork to ensure concrete forming quality and prevent grout leakage. The quality and efficiency of suspended formwork construction are crucial to the project progress. Currently, the mainstream method is to assemble and fix wooden / steel formwork on-site with steel pipe supports and fasteners. This method has the following technical problems: Firstly, the dismantling and assembly efficiency is low. The erection of supports and the fixing of formwork require the cooperation of multiple workers, which demands high technical skills and coordination, and the assembly is time-consuming. After the concrete reaches the demolding strength, the supports, fasteners and formwork must be dismantled piece by piece. The dismantling and assembly of the formwork for a single section of cast-in-place strip is time-consuming, which seriously restricts the construction progress and cannot meet the needs of efficient construction of prefabricated buildings. Secondly, the versatility and adaptability are poor. The dimensions of the formwork and supports are fixed. When the width of the cast-in-place strip changes due to design adjustments or the thickness of the composite slab changes due to structural requirements, the existing components cannot be adapted and need to be customized or replaced. This increases the cost of material purchase and labor adjustment, and also requires the storage of various specifications of accessories, which increases the difficulty of material management and warehousing pressure.

[0004] In summary, existing suspended formwork construction methods suffer from low assembly and disassembly efficiency, slow progress, poor versatility, high costs, and management difficulties, becoming a bottleneck restricting the quality and efficiency of prefabricated building construction. Therefore, developing a convenient and versatile suspended formwork construction device and method for prefabricated composite slab cast-in-place concrete has significant practical importance and application value. Summary of the Invention

[0005] The purpose of this invention is to provide a prefabricated composite slab cast-in-place formwork construction device and its usage method, which solves the technical problem of low construction efficiency, poor versatility and adaptability of existing formwork construction.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A prefabricated composite slab cast-in-place strip formwork construction device includes a load-bearing beam assembly, an adjustment assembly, a support assembly, a lifting mechanism, a formwork assembly, and a mold. The load-bearing beam assembly includes two parallel and spaced load-bearing beams, which are adjustablely connected by the adjustment assembly. A support assembly that fits against the top surface of the composite slab is adjustablely installed at the bottom of both ends of the load-bearing beams. A lifting mechanism is installed at each end of the load-bearing beams, and a total of four lifting mechanisms are installed on the two load-bearing beams. A formwork assembly is connected between the four lifting mechanisms. A mold for the composite slab to be cast in place is clamped on the formwork assembly. Multiple vibration components are evenly spaced at the bottom of the formwork assembly.

[0007] Preferably, a handle is provided on the top surface of the load-bearing beam, a protective cover is fitted on the handle, and a level is provided in the middle of one side of the load-bearing beam.

[0008] Preferably, the adjusting assembly includes a first bidirectional threaded rod, with a first limiting ring at each of the two ends of the first bidirectional threaded rod, a first adjusting part in the middle of the first bidirectional threaded rod, and a threaded part at each of the two ends of the first bidirectional threaded rod. A threaded block is threadedly connected to the threaded part of the first bidirectional threaded rod, and a U-shaped groove is provided on both sides of the threaded block. A linkage rod is rotatably connected inside the U-shaped groove, and the other end of the linkage rod is rotatably connected to a connecting seat. The connecting seat is fixedly installed on the side of the load-bearing beam.

[0009] Preferably, the support assembly includes a support foot, an anti-slip pad is provided at the bottom of the support foot, the anti-slip pad has anti-slip texture on the bottom surface, an adjusting bolt is integrally provided at the top of the anti-slip pad, the adjusting bolt is threaded to the bottom of the load-bearing beam, and a fastening nut is threaded to the adjusting bolt, the top surface of the fastening nut is pressed against the bottom surface of the load-bearing beam.

[0010] Preferably, the lifting mechanism includes a servo motor, which is fixedly mounted at the end of the load-bearing beam. The output end of the servo motor is connected to a lead screw via a coupling. The lead screw vertically penetrates the load-bearing beam. A second limiting ring is fixedly connected to the bottom end of the lead screw, and a support rod is threaded onto the lead screw.

[0011] Preferably, the lifting formwork assembly includes a support plate, with a clamping plate adjustablely provided at the top of both ends of the support plate, and a through hole horizontally provided at the bottom of both ends of the support plate, into which the support rod is inserted.

[0012] Preferably, a through groove is provided in the middle of the support plate, perpendicular to the through hole, and a second bidirectional threaded rod is rotatably connected to the through groove. The through groove includes a rotating groove and a sliding groove, which is adapted to the cross-shaped structure of the clamping plate. Both ends of the second bidirectional threaded rod are provided with a threaded section, and a second adjusting section is provided at the end of the second bidirectional threaded rod. A slider is provided in the middle of the bottom surface of the clamping plate, and a limiting block is provided on both sides of the slider to form a cross-shaped structure. The cross-shaped structure is slidably connected in the sliding groove. A threaded hole is provided in the middle of the slider, and the threaded hole is threadedly connected to the threaded section of the second bidirectional threaded rod.

[0013] Preferably, the mold includes a bottom template and side templates, with the bottom template disposed on the top of the support plate and a side template vertically disposed at both ends of the bottom template.

[0014] Preferably, the vibration assembly includes a vibration motor and a clamp, with the vibration motor fixedly mounted on the bottom surface of the support plate via the clamp.

[0015] A method for using a prefabricated composite slab cast-in-place construction device with suspended formwork includes the following steps: Step 1: Use the handles to move the device to the designated location, and then place the two load-bearing beams on top of the composite slabs on both sides of the cast-in-place strip to be constructed. Step 2: Observe the level and make preliminary adjustments to the position of the load-bearing beam; Step 3: Rotate the first adjustment part to drive the first bidirectional threaded rod to rotate, causing the threaded blocks at both ends to move towards or away from each other. The threaded blocks push or pull the connecting seats on both sides through the linkage rod, thereby adjusting the distance between the two load-bearing beams. Step 4: After adjustment, tighten the four adjusting bolts to fine-tune the height of the support feet, so that the anti-slip pad is in close contact with the top surface of the composite slab and the load-bearing beam remains horizontal. Step 5: Observe the level again, then tighten the fastening nut to lock the support height; Step 6: Check the initial position of the support rods to ensure that the support rods abut against the second limiting ring. Then, insert the two support rods on one side of the support plate into the through holes. Next, insert the two support rods on the other side of the support plate into the through holes and adjust the position of the support plate so that the support plate is located in the center of the bottom end of the cast-in-place strip. Step 7: Place the bottom template on the support plate, start all servo motors to run synchronously, the servo motors drive the lead screw to rotate, which drives the support rod to move upward, and then drives the entire hanging formwork assembly to rise smoothly until the support plate abuts the bottom template against the bottom end of the composite plate. Step 8: Rotate the second adjustment part to drive the second bidirectional threaded rod to rotate. The second bidirectional threaded rod drives the two sliders on it to slide synchronously towards each other in the slide groove, clamping and fixing the side template and the two sides of the composite plate from both sides. Step 9: Start the vibratory motor. The vibration is transmitted to the mold through the support plate to compact the concrete. Step 10: Once the concrete reaches the required strength, all servo motors are synchronously reversed. The servo motors drive the lead screws to reverse, causing the support rods to descend, thereby smoothly lowering the entire formwork assembly and mold to achieve demolding.

[0016] In this invention, the integrated load-bearing beam assembly, adjustment assembly, lifting mechanism, and formwork assembly achieve rapid installation and disassembly. Compared with the traditional cumbersome steel pipe support and fastener assembly, the adjustment assembly can easily adjust the spacing of the load-bearing beams to adapt to different widths of cast-in-place strips. The servo motor driving the lead screw in the lifting mechanism can precisely control the lifting and lowering of the formwork assembly, realizing rapid positioning and demolding of the mold, greatly reducing manual operation time and labor intensity, and effectively accelerating the construction progress.

[0017] The adjustment component can flexibly adjust the spacing between the two load-bearing beams. The adjusting bolts and fastening nuts in the support component can finely adjust the support height to adapt to the differences in the thickness of the composite slab and the floor elevation. The clamping plate in the formwork component is linked with the second bidirectional threaded rod through the slide groove, which can be adapted to molds of different widths. This solves the problem of frequent template customization due to design changes in traditional construction, and reduces material costs and warehousing management difficulties.

[0018] By setting a level, the load-bearing beam is ensured to be installed flat, providing a foundation for precise mold positioning. The lifting mechanism can achieve synchronous or individual fine-tuning to keep the mold level at all times, avoiding elevation errors in the cast-in-place concrete. Through the design of the vibration component, the concrete can be effectively vibrated during the pouring process, improving density and reducing air bubbles and defects. In addition, the mold is made of high-strength film-coated bamboo plywood coated with polytetrafluoroethylene anti-stick coating, which is not only high in strength and not easily deformed, but also easy to demold, with a smooth concrete surface and high molding quality.

[0019] The bottom of the support component is equipped with an anti-slip pad with anti-slip texture, which enhances the friction between the equipment and the surface of the composite plate and prevents slippage. All connection parts are locked by threaded fastening or limit structure, making the structure stable and reliable. The controller can accurately control the servo motor and vibration motor, avoiding errors that may be caused by manual operation and improving the safety and controllability of the construction process.

[0020] In summary, this application solves the technical problems of low construction efficiency, poor versatility and adaptability of existing suspended formwork. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the load-bearing beam assembly structure of the present invention; Figure 3This is a schematic diagram of the adjustment component structure of the present invention; Figure 4 This is a schematic diagram of the supporting component structure of the present invention; Figure 5 This is a schematic diagram of the mold structure of the present invention; Figure 6 This is a schematic diagram of the lifting mechanism structure of the present invention; Figure 7 This is a schematic diagram of the lifting formwork assembly structure of the present invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the support plate of the present invention; Figure 9 This is a schematic diagram of the second bidirectional threaded rod structure of the present invention; Figure 10 This is a schematic diagram of the clamping plate structure of the present invention; In the diagram: 1. Load-bearing beam assembly; 2. Adjustment assembly; 3. Support assembly; 4. Lifting mechanism; 5. Hoisting mold assembly; 6. Mold; 7. Vibration assembly; 8. Composite plate; 11. Load-bearing beam; 12. Handle; 13. Level; 21. First bidirectional threaded rod; 22. Threaded block; 23. Linkage rod; 24. Connecting seat; 31. Support foot; 32. Anti-slip pad; 33. Adjusting bolt; 41. Servo motor; 42. Lead screw; 43. Second limit ring; 44. Support rod 51. Support plate; 52. Second bidirectional threaded rod; 53. Clamping plate; 61. Bottom template; 62. Side template; 70. Vibration motor; 71. Clamp; 121. Protective sleeve; 211. First limiting ring; 212. First adjusting part; 221. U-shaped groove; 321. Anti-slip texture; 331. Fastening nut; 511. Through hole; 512. Rotating groove; 513. Slide groove; 521. Second adjusting part; 531. Sliding block; 532. Limiting block; 533. Threaded hole. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings: like Figures 1-10The device shown is a prefabricated composite slab cast-in-place strip formwork construction device, comprising a load-bearing beam assembly 1, an adjusting assembly 2, a supporting assembly 3, a lifting mechanism 4, a formwork assembly 5, and a mold 6. The load-bearing beam assembly 1 includes two parallel and spaced load-bearing beams 11, which are adjustablely connected by the adjusting assembly 2. A supporting assembly 3 is adjustablely installed at the bottom of both ends of the load-bearing beams 11, which is in contact with the top surface of the composite slab 8. A lifting mechanism 4 is installed at each end of the load-bearing beams 11, for a total of four lifting mechanisms 4 on the two load-bearing beams 11. A formwork assembly 5 connects the four lifting mechanisms 4. The formwork assembly 5 holds the mold 6 for the composite slab 8 to be cast in place. Multiple vibration components 7 are evenly spaced at the bottom of the formwork assembly 5. During use, this device achieves rapid installation and disassembly. Compared with the traditional cumbersome steel pipe support and fastener assembly, the spacing of the load-bearing beam 11 can be easily adjusted by adjusting component 2 to adapt to cast-in-place strips of different widths. The servo motor 41 in the lifting mechanism 4 drives the lead screw 42, which can precisely control the lifting and lowering of the formwork component 5, and realize the rapid positioning and demolding of the mold 6, which greatly reduces manual operation time and labor intensity and effectively speeds up the construction progress.

[0023] A handle 12 is provided on the top surface of the load-bearing beam 11, and a protective cover 121 is fitted on the handle 12. A level 13 is provided in the middle of one side of the load-bearing beam 11.

[0024] The adjusting assembly 2 includes a first bidirectional threaded rod 21. A first limiting ring 211 is provided at both ends of the first bidirectional threaded rod 21. A first adjusting part 212 is provided in the middle of the first bidirectional threaded rod 21. A threaded part is provided at both ends of the first bidirectional threaded rod 21. A threaded block 22 is threadedly connected to the threaded part of the first bidirectional threaded rod 21. A U-shaped groove 221 is provided on both sides of the threaded block 22. A linkage rod 23 is rotatably connected inside the U-shaped groove 221. The other end of the linkage rod 23 is rotatably connected to a connecting seat 24. The connecting seat 24 is fixedly installed on the side of the load-bearing beam 11.

[0025] The support assembly 3 includes a support foot 31, with an anti-slip pad 32 at the bottom of the support foot 31. The anti-slip pad 32 has anti-slip texture 321 on its bottom surface. The anti-slip pad 32 with anti-slip texture 321 enhances the friction between the device and the surface of the composite plate 8, preventing slippage. All connection parts are locked by threaded fastening or limiting structure, ensuring a stable and reliable structure. An adjusting bolt 33 is integrally provided at the top of the anti-slip pad 32. The adjusting bolt 33 is threaded to the bottom of the load-bearing beam 11, and a fastening nut 331 is threaded to the adjusting bolt 33. The top surface of the fastening nut 331 presses against the bottom surface of the load-bearing beam 11.

[0026] The lifting mechanism 4 includes a servo motor 41, which is fixedly mounted at the end of the load-bearing beam 11. The output end of the servo motor 41 is connected to a lead screw 42 via a coupling. The lead screw 42 vertically passes through the load-bearing beam 11. A second limiting ring 43 is fixedly connected to the bottom end of the lead screw 42. A support rod 44 is threaded onto the lead screw 42.

[0027] The formwork assembly 5 includes a support plate 51, with a clamping plate 53 adjustablely mounted at the top of both ends of the support plate 51. A through hole 511 is horizontally provided at the bottom of both ends of the support plate 51, and a support rod 44 is inserted into the through hole 511. A through groove is provided in the middle of the support plate 51, perpendicular to the through hole 511, and a second bidirectional threaded rod 52 is rotatably connected to the through groove. The through groove includes a rotating groove 512 and a sliding groove 513, the sliding groove 513 being adapted to the cross-shaped structure of the clamping plate 53. Both ends of the second bidirectional threaded rod 52 have a threaded section, and a second adjusting part 521 is provided at each end of the second bidirectional threaded rod 52.

[0028] A slider 531 is provided in the middle of the bottom surface of the clamping plate 53. A limiting block 532 is provided on both sides of the slider 531 to form a cross-shaped structure. The cross-shaped structure is slidably connected in the groove 513. A threaded hole 533 is provided in the middle of the slider 531. The threaded hole 533 is threadedly connected to the threaded part of the second bidirectional threaded rod 52.

[0029] The mold 6 includes a bottom template 61 and side templates 62. The bottom template 61 is set on top of the support plate 51, and a side template 62 is vertically set at both ends of the bottom template 61. Both the bottom template 61 and the side templates 62 are made of high-strength film-coated bamboo plywood, and the inner walls of the bottom template 61 and the side templates 62 are coated with a polytetrafluoroethylene anti-stick coating.

[0030] The vibration assembly 7 includes a vibration motor 70 and a clamp 71. The vibration motor 70 is fixedly mounted on the bottom surface of the support plate 51 by the clamp 71. In this example, both the vibration motor 70 and the servo motor 41 are electrically connected to the controller, which controls the synchronous or individual rotation of the servo motor 41 and the vibration motor 70.

[0031] Step 1: Use handle 12 to move the device to the designated position, and then place the two load-bearing beams 11 on top of the composite slabs 8 on both sides of the cast-in-place strip to be constructed. Step 2: Observe the level 13 and make preliminary adjustments to the position of the load-bearing beam 11 to make it roughly horizontal; Step 3: Rotate the first adjustment part 212 of the adjustment assembly 2 to drive the first bidirectional threaded rod 21 to rotate, which in turn drives the threaded blocks 22 at both ends to move towards or away from each other. The threaded blocks 22 push or pull the connecting seats 24 on both sides through the linkage rod 23, thereby adjusting the distance between the two load-bearing beams 11 to adapt to the design width of the cast-in-place strip. Step 4: After adjustment, tighten the adjusting bolts 33 of the four support components 3 respectively, and fine-tune the height of the support feet 31 by rotating the adjusting bolts 33 to ensure that the anti-slip pads 32 are in close contact with the top surface of the composite plate 8 and the load-bearing beams 11 remain horizontal. Step 5: Observe the level 13 again to ensure that the load-bearing beam is installed flat, providing a foundation for the precise positioning of the mold 6. Then tighten the fastening nut 331 to lock the support height and prevent loosening during construction. Step 6: Check the initial position of the support rod 44 to ensure that the support rod 44 abuts against the second limiting ring 43. Then, pass the two support rods 44 on one side of the support plate 51 through the through hole 511. Next, pass the two support rods 44 on the other side of the support plate 51 through the through hole 511 and adjust the position of the support plate 51 to ensure that the support plate 51 is located in the center of the bottom end of the cast-in-place strip. Step 7: Place the bottom template 61 of mold 6 on the support plate 51 of the hanging mold assembly 5. Start all the servo motors 41 of the lifting mechanism 4 through the controller to run synchronously. The servo motors 41 drive the lead screw 42 to rotate, which drives the support rod 44 to move upward. Then, through the support rod 44 inserted into the through hole 511, the entire hanging mold assembly 5 is driven to rise smoothly until the support plate 51 abuts the bottom template 61 against the bottom end of the composite plate 8. During the rise, observe the position of the support plate 51. If it is necessary to make a fine adjustment to the level, the controller can control one or some of the servo motors 41 to move in jog to achieve the leveling of the hanging mold assembly 5. The lifting mechanism 4 can achieve synchronous or individual fine adjustment to keep the mold 6 level and avoid elevation errors in the cast-in-place concrete. Step 8: Place the side template 62 on both sides of the bottom template 61, rotate the second adjustment part 521 on both sides of the lifting formwork assembly 5, drive the second bidirectional threaded rod 52 to rotate, the second bidirectional threaded rod 52 drives the two sliders 531 on it to slide synchronously towards each other in the slide groove 513, and prevents separation through the cross-shaped structure, thereby driving the clamping plate 53 to move, clamping and fixing the side template 62 and the two sides of the composite plate 8 from both sides. At this time, the mold 6 forms a mold cavity. The clamping plate 53 in the lifting formwork assembly 5 is linked with the second bidirectional threaded rod 52 through the slide groove 513, which can adapt to molds 6 of different widths, solves the problem of frequent template customization due to design changes in traditional construction, reduces material costs and storage management difficulty, and then performs concrete pouring operations in the mold cavity. Step 9: During or after pouring, start the vibration assembly 7 as needed. Start the vibration motor 70 through the controller. The vibration is transmitted to the mold 6 through the support plate 51 to vibrate the concrete, remove internal air bubbles, and improve the density. Through the design of the vibration assembly 7, the concrete can be effectively vibrated during the pouring process to improve the density and reduce air bubbles and defects. Step 10: Once the concrete reaches the required strength, the controller controls all the servo motors 41 of the lifting mechanism 4 to reverse synchronously. The servo motors 41 drive the lead screw 42 to reverse, which in turn drives the support rod 44 to descend, thereby smoothly lowering the entire formwork assembly 5 and the mold 6 to achieve demolding.

[0032] The above embodiments are merely illustrative of the concept and implementation of the present invention and are not intended to limit it. Under the concept of the present invention, technical solutions without substantial changes are still within the scope of protection.

Claims

1. A prefabricated composite slab cast-in-place construction device with suspended formwork, characterized in that: The system includes a load-bearing beam assembly (1), an adjustment assembly (2), a support assembly (3), a lifting mechanism (4), a formwork assembly (5), and a mold (6). The load-bearing beam assembly (1) includes two parallel load-bearing beams (11) that are spaced apart. The two load-bearing beams (11) are connected in an adjustable manner through the adjustment assembly (2). A support assembly (3) that is attached to the top surface of the composite plate (8) is adjustablely provided at the bottom of both ends of the load-bearing beams (11). A lifting mechanism (4) is provided at the end of each load-bearing beam (11). A total of four lifting mechanisms (4) are provided on the two load-bearing beams (11). A formwork assembly (5) is connected between the four lifting mechanisms (4). A mold (6) for the composite plate (8) to be cast in place is held on the formwork assembly (5). Multiple vibration assemblies (7) are evenly spaced at the bottom of the formwork assembly (5). The adjustment component (2) includes a first bidirectional threaded rod (21), a first limiting ring (211) is provided at both ends of the first bidirectional threaded rod (21), a first adjustment part (212) is provided in the middle of the first bidirectional threaded rod (21), a threaded part is provided at both ends of the first bidirectional threaded rod (21), a threaded block (22) is threadedly connected to the threaded part of the first bidirectional threaded rod (21), a U-shaped groove (221) is provided on both sides of the threaded block (22), a linkage rod (23) is rotatably connected inside the U-shaped groove (221), and the other end of the linkage rod (23) is rotatably connected to the connecting seat (24), and the connecting seat (24) is fixedly installed on the side of the load-bearing beam (11); The lifting mechanism (4) includes a servo motor (41), which is fixedly installed at the end of the load-bearing beam (11). The output end of the servo motor (41) is connected to a lead screw (42) through a coupling. The lead screw (42) passes vertically through the load-bearing beam (11). A second limiting ring (43) is fixedly connected at the bottom end of the lead screw (42). A support rod (44) is threaded onto the lead screw (42). The hanging mold assembly (5) includes a support plate (51), and a clamping plate (53) is adjustablely provided at the top of both ends of the support plate (51). A through hole (511) is provided horizontally at the bottom of both ends of the support plate (51), and the support rod (44) is inserted into the through hole (511).

2. The prefabricated composite slab cast-in-place construction device with suspended formwork according to claim 1, characterized in that: A handle (12) is provided on the top surface of the load-bearing beam (11), a protective sleeve (121) is fitted on the handle (12), and a level (13) is provided in the middle of one side of the load-bearing beam (11).

3. The prefabricated composite slab cast-in-place construction device with suspended formwork according to claim 2, characterized in that: The support assembly (3) includes a support foot (31), an anti-slip pad (32) is provided at the bottom of the support foot (31), an anti-slip texture (321) is provided on the bottom surface of the anti-slip pad (32), and an adjusting bolt (33) is integrally provided at the top of the anti-slip pad (32). The adjusting bolt (33) is threaded to the bottom of the load-bearing beam (11), and a fastening nut (331) is threaded to the adjusting bolt (33). The top surface of the fastening nut (331) is pressed against the bottom surface of the load-bearing beam (11).

4. The prefabricated composite slab cast-in-place construction device with suspended formwork according to claim 3, characterized in that: A through groove is provided in the middle of the support plate (51) in a direction perpendicular to the through hole (511). A second bidirectional threaded rod (52) is rotatably connected to the through groove. The through groove includes a rotating groove (512) and a sliding groove (513). The sliding groove (513) is adapted to the cross-shaped structure of the clamping plate (53). Both ends of the second bidirectional threaded rod (52) are provided with a threaded section. A second adjusting section (521) is provided at the end of the second bidirectional threaded rod (52). A slider (531) is provided in the middle of the bottom surface of the clamping plate (53). A limiting block (532) is provided on both sides of the slider (531) to form a cross-shaped structure. The cross-shaped structure is slidably connected in the sliding groove (513). A threaded hole (533) is provided in the middle of the slider (531). The threaded hole (533) is threadedly connected to the threaded section of the second bidirectional threaded rod (52).

5. The prefabricated composite slab cast-in-place construction device with suspended formwork according to claim 4, characterized in that: The mold (6) includes a bottom template (61) and a side template (62). The bottom template (61) is set on the top of the support plate (51), and a side template (62) is vertically set at both ends of the bottom template (61).

6. The prefabricated composite slab cast-in-place construction device with suspended formwork according to claim 5, characterized in that: The vibration assembly (7) includes a vibration motor (70) and a clamp (71), and the vibration motor (70) is fixedly installed on the bottom surface of the support plate (51) by the clamp (71).

7. The method of using the prefabricated composite slab cast-in-place formwork construction device according to claim 6, characterized in that, Includes the following steps: Step 1: Use the handle (12) to move the device to the designated location, and then place the two load-bearing beams (11) on top of the composite slabs (8) on both sides of the cast-in-place strip to be constructed. Step 2: Observe the level (13) and make preliminary adjustments to the position of the load-bearing beam (11); Step 3: Rotate the first adjustment part (212) to drive the first bidirectional threaded rod (21) to rotate, which will cause the threaded blocks (22) at both ends to move towards each other or away from each other. The threaded blocks (22) push or pull the connecting seats (24) on both sides through the linkage rod (23), thereby adjusting the distance between the two load-bearing beams (11). Step 4: After the adjustment is completed, tighten the four adjusting bolts (33) respectively to fine adjust the height of the support foot (31) so that the anti-slip pad (32) is in close contact with the top surface of the composite plate (8) and the load-bearing beam (11) remains horizontal. Step 5: Observe the level (13) again, and then tighten the fastening nut (331) to lock the support height; Step 6: Check the initial position of the support rod (44) to ensure that the support rod (44) abuts against the second limiting ring (43). Then, insert the two support rods (44) on one side of the support plate (51) into the through hole (511). Next, insert the two support rods (44) on the other side of the support plate (51) into the through hole (511) and adjust the position of the support plate (51) so that the support plate (51) is located in the center of the bottom end of the cast-in-place strip. Step 7: Place the bottom template (61) on the support plate (51), start all servo motors (41) to run synchronously, the servo motors (41) drive the lead screw (42) to rotate, drive the support rod (44) to move upward, and then drive the entire hanging mold assembly (5) to rise smoothly through the support rod (44) until the support plate (51) abuts the bottom template (61) against the bottom end of the composite plate (8); Step 8: Rotate the second adjustment part (521) to drive the second bidirectional threaded rod (52) to rotate. The second bidirectional threaded rod (52) drives the two sliders (531) on it to slide synchronously towards each other in the slide groove (513) to clamp and fix the side template (62) and the two sides of the composite plate (8) from both sides. Step 9: Start the vibratory motor (70), and the vibration is transmitted to the mold (6) through the support plate (51) to vibrate the concrete; Step 10: When the concrete reaches the required strength, all servo motors (41) are synchronously reversed. The servo motors (41) drive the lead screw (42) to reverse, which drives the support rod (44) to descend, thereby smoothly lowering the entire formwork assembly (5) and the mold (6) to achieve demolding.

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