A modular prefabricated building floor structure

Abstract

This invention belongs to the field of modular prefabricated floor slab technology, and more particularly to a modular prefabricated building floor slab structure, including a floor slab body. Multiple locking mechanisms and multiple U-shaped reinforcing bars are equally spaced on both sides of the floor slab body. The locking mechanisms and U-shaped reinforcing bars on both sides of the floor slab body are centrally symmetrically distributed. Each locking mechanism includes a box detachably mounted on the floor slab body. Inside the box is a unidirectional rotating column, and two centrally symmetrically distributed levers are fixedly mounted on the side of the rotating column. This invention, by setting multiple sets of cooperating locking mechanisms and U-shaped reinforcing bars between adjacent floor slab bodies, applies active traction force to the slabs during splicing, creating reliable pre-stress at the joint, transforming "passive filling" into "active pressing," effectively overcoming the problem of penetrating micro-cracks caused by inconsistent drying shrinkage deformation in traditional post-cast strips.

Description

Technical Field

[0001] This invention relates to the field of modular prefabricated floor slab technology, and more particularly to a modular prefabricated building floor slab structure. Background Technology

[0002] In recent years, driven by the national promotion of prefabricated building development and the strategic goal of "carbon peaking and carbon neutrality," prefabricated buildings have ushered in a period of rapid development. As one of the largest structural components in a building, the level of prefabrication and modularization of floor slabs directly affects the construction efficiency, quality, safety, and overall energy consumption of prefabricated buildings. Against this backdrop, integrated cement products that combine structural load-bearing and thermal insulation functions have become a key development direction for the industry. For example, patent application number 202511176669.0 discloses a reinforced concrete load-bearing floor slab structure based on a pre-embedded structure.

[0003] However, in both the above-mentioned technologies and existing technologies, there is a lack of effective traction at the joint between the two floor slabs, making it difficult to achieve a tight connection. During the splicing and installation of existing precast floor slabs, there is generally a lack of a connection mechanism that can actively apply traction between adjacent slabs, and they mainly rely on passive filling with post-poured concrete or grout.

[0004] The above connection method has the following problems: First, shrinkage cracks are prone to occur at the joints. The difference in age between the post-cast material and the precast slab results in inconsistent drying shrinkage deformation, which can easily form penetrating micro-cracks at the joints, leading to quality hazards such as floor slab leakage and steel corrosion. Second, the lack of prestress or pre-tightening force means that effective compressive stress cannot be formed between adjacent slabs. Shear force is transferred only by the post-cast strip, making it difficult to ensure the integrity of the floor slab under temperature changes, shrinkage deformation, and service loads. Third, the joint structure is complex, and the construction quality is difficult to guarantee. On-site grouting or pouring operations are greatly affected by factors such as construction conditions and operator skill, which can easily lead to problems such as incomplete grouting and insufficient density, affecting structural safety and durability. Therefore, a modular prefabricated building floor slab structure is proposed. Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, this invention proposes a modular prefabricated building floor slab structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a modular prefabricated building floor slab structure, including a floor slab body, wherein multiple locking mechanisms and multiple U-shaped steel bars are provided on both sides of the floor slab body at equal intervals, and the multiple locking mechanisms and multiple U-shaped steel bars on both sides of the floor slab body are centrally symmetrically distributed. The locking mechanism includes a box that can be detachably installed on the main body of the floor slab. The box has a rotating column that rotates in one direction inside. Two paddles that are centrally symmetrically distributed are fixedly installed on the side of the rotating column. The box has a rectangular opening on its side.

[0007] Preferably, trapezoidal grooves are provided on both sides of the floor slab body, and multiple installation slots are provided on the side of the two trapezoidal grooves that are close to each other. The housings on the multiple locking mechanisms are respectively provided in the corresponding installation slots.

[0008] Preferably, a trapezoidal frame is fixedly installed on one side of the rectangular opening of the box, and the trapezoidal frame has two inclined sides that are adapted to the inner walls of the top and bottom of the mounting groove.

[0009] Preferably, an internal hexagonal socket is fixedly installed at the top of the rotating column. The internal hexagonal socket passes through the top of the housing and is rotatably connected to the housing. An adjustment hole is provided on the inner wall of the top of the mounting groove. The adjustment hole is coaxially arranged with the internal hexagonal socket below.

[0010] Preferably, the bottom end of the rotating column is connected to the inner wall of the bottom of the housing via a one-way bearing. The one-way bearing includes an inner ring and an outer ring. The outer ring of the one-way bearing is fixedly sleeved on the rotating column, and the outer ring of the one-way bearing is fixedly connected to the inner wall of the bottom of the housing.

[0011] Preferably, a slot is provided on the inner wall of the mounting groove away from the opening, an ear plate is fixedly installed on the side of the box away from the opening of the mounting groove, and two through holes are provided on the main body of the floor slab. The two through holes are respectively connected to the corresponding slots, and strip steel bars are provided in both through holes. The two strip steel bars pass through the corresponding ear plates.

[0012] Preferably, the top inner wall of the trapezoidal groove is provided with multiple filling ports that are evenly distributed, and the mounting groove and filling ports on the same side are staggered.

[0013] Preferably, the U-shaped steel bar is integrally cast with the floor slab body, and the locking mechanism and the strip steel bar are detachably connected and assembled with the floor slab body.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention sets up multiple sets of locking mechanisms and U-shaped steel bars between two adjacent floor slabs to apply active traction force to the slabs during splicing, so that reliable pre-stress is formed at the joint, changing "passive filling" to "active pressing", effectively overcoming the problem of penetrating microcracks caused by inconsistent drying shrinkage deformation in traditional post-cast strips; During the assembly of two adjacent floor slabs, a trapezoidal frame, in conjunction with trapezoidal grooves on the sides of the slabs, precisely constrains the relative positions of the two slabs during splicing, ensuring their alignment in the vertical direction and accurate horizontal alignment. Furthermore, multiple locking mechanisms and U-shaped reinforcing bars enable simultaneous "traction tensioning" and "guiding positioning," preventing unevenness in slab surface height or joint width caused by slab misalignment during pre-tensioning. This effectively guarantees the flatness and appearance quality of the assembled adjacent floor slabs, reducing subsequent leveling and patching work. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the assembly of the two floor slabs in this invention; Figure 2 These are exploded views of two modular prefabricated building floor slab structures in this invention; Figure 3 This is an exploded view of a modular prefabricated building floor slab structure proposed in this invention; Figure 4 for Figure 3 A magnified structural diagram of part A in the middle; Figure 5 This is a side sectional view of the locking mechanism and U-shaped steel bars in a modular prefabricated building floor slab structure proposed in this invention; Figure 6 This is a schematic diagram showing the connection of the rotating column, U-shaped steel bar, and two lever blocks in a modular prefabricated building floor slab structure proposed in this invention. Figure 7 This is a structural schematic diagram of the main floor slab and multiple U-shaped steel bars in a modular prefabricated building floor slab structure proposed in this invention. Figure 8 This is a schematic diagram of the overall structure of a modular prefabricated building floor slab structure proposed in this invention.

[0016] In the diagram: 1. Main floor slab; 2. Locking mechanism; 3. U-shaped steel bar; 4. Strip steel bar; 11. Mounting slot; 12. Slot; 13. Through hole; 14. Adjustment hole; 15. Trapezoidal groove; 16. Filling port; 21. Housing; 22. Trapezoidal frame; 23. Hypotenuse; 24. Rectangular opening; 25. One-way bearing; 26. Rotating column; 27. Pulley; 28. Socket socket; 29. ​​Ear plate. Detailed Implementation

[0017] The technical solution of the present invention will now be clearly and completely described 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.

[0018] Please refer to Figures 1-8 The present invention provides a technical solution: a modular prefabricated building floor slab structure, including a floor slab body 1, and multiple locking mechanisms 2 and multiple U-shaped steel bars 3 are provided on both sides of the floor slab body 1 at equal intervals. The multiple locking mechanisms 2 and multiple U-shaped steel bars 3 located on both sides of the floor slab body 1 are all centrally symmetrically distributed. The locking mechanism 2 includes a box 21 that can be detachably installed on the main body of the floor slab 1. The box 21 has a rotating column 26 that rotates in one direction inside. Two paddle blocks 27 that are centrally symmetrically distributed are fixedly installed on the side of the rotating column 26. A rectangular opening 24 is provided on the side of the box 21.

[0019] Both sides of the floor slab body 1 are provided with trapezoidal grooves 15. On the side of the two trapezoidal grooves 15 that are close to each other, there are multiple installation slots 11 that are evenly distributed. The boxes 21 on the multiple locking mechanisms 2 are respectively provided in the corresponding installation slots 11.

[0020] A trapezoidal frame 22 is fixedly installed on one side of the rectangular opening 24. The trapezoidal frame 22 has two inclined sides 23 that are adapted to the inner walls of the top and bottom of the mounting groove 11.

[0021] A hexagon socket 28 is fixedly installed at the top of the rotating column 26. The hexagon socket 28 passes through the top of the housing 21 and is rotatably connected to the housing 21. An adjustment hole 14 is provided on the inner wall of the top of the mounting groove 11. The adjustment hole 14 is coaxially arranged with the hexagon socket 28 below.

[0022] The bottom end of the rotating column 26 is connected to the inner wall of the bottom of the housing 21 by a one-way bearing 25. The one-way bearing 25 includes an inner ring and an outer ring. The outer ring of the one-way bearing 25 is fixedly sleeved on the rotating column 26 and is fixedly connected to the inner wall of the bottom of the housing 21.

[0023] Furthermore, such as Figure 5 and Figure 6 As shown, by setting a one-way bearing 25, the rotating column 26 can only rotate in the counterclockwise direction. When the rotating column 26 is subjected to a clockwise torsional force, it will be locked by the one-way bearing 25, preventing the rotating column 26 from rotating clockwise.

[0024] A slot 12 is provided on the inner wall of the mounting groove 11 away from the opening. An ear plate 29 is fixedly installed on the side of the box body 21 away from the opening of the mounting groove 11. Two through holes 13 are provided on the floor slab body 1. The two through holes 13 are connected to the corresponding slots 12 respectively. A strip steel bar 4 is provided in both through holes 13. The two strip steel bars 4 pass through the corresponding ear plates 29 respectively.

[0025] Multiple filling ports 16 are evenly spaced on the top inner wall of the trapezoidal groove 15, and the mounting groove 11 and the filling ports 16 on the same side are staggered.

[0026] Furthermore, such as Figure 1 and Figure 4 As shown, when the two floor slab bodies 1 are assembled together, concrete can be poured into the connection between the two floor slab bodies 1 through multiple injection ports 16. The concrete wraps around the multiple trapezoidal frames 22 and U-shaped steel bars 3 between the two floor slab bodies 1, thereby strengthening the connection between the two floor slab bodies 1.

[0027] The U-shaped steel bar 3 is integrally cast with the floor slab body 1, and the locking mechanism 2 and the strip steel bar 4 are detachably connected and assembled with the floor slab body 1.

[0028] In this embodiment: During production, multiple U-shaped steel bars 3 are placed in the mold for casting the main body of the floor slab 1, and the multiple U-shaped steel bars 3 are placed at the target positions in the casting mold. Then, concrete is poured into the casting mold. After the concrete solidifies, the main body of the floor slab 1 is completed. At this time, the shape of the main body of the floor slab 1 and the multiple U-shaped steel bars 3 is as follows. Figure 7 As shown; Next, each locking mechanism 2 is inserted into its corresponding mounting slot 11, and each ear plate 29 is engaged in its corresponding slot 12. Then, two strip steel bars 4 are inserted into their corresponding through holes 13. The two strip steel bars 4 can then be used to thread the two rows of ear plates 29 together, so that the locking mechanism 2 is assembled and fixed to the floor slab body 1 through the strip steel bars 4. At this time, the floor slab body 1, multiple locking mechanisms 2, multiple U-shaped steel bars 3, and two strip steel bars 4 are arranged as follows: Figure 8 As shown.

[0029] When assembling and connecting the two floor slab bodies 1, first make the two floor slab bodies 1 on another plane, then make the front and rear sides of the two floor slab bodies 1 flush, and then pull one floor slab body 1 to move towards the other floor slab body 1. As the two floor slab bodies 1 approach each other, multiple U-shaped steel bars 3 on the side of one floor slab body 1 will be inserted into multiple locking mechanisms 2 on the side of the other floor slab body 1 respectively. like Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, after the U-shaped steel bar 3 is inserted into the box 21 through the rectangular opening 24, multiple hexagon sockets 28 at the connection of the two floor slab bodies 1 are turned in sequence by a large torque wrench. When the hexagon socket 28 drives the rotating column 26 to rotate counterclockwise, the two levers 27 will rotate counterclockwise synchronously with the rotating column 26. One of the levers 27 will hook the corresponding U-shaped steel bar 3. Then, by continuing to turn the hexagon socket 28, the levers 27 will pull the U-shaped steel bar 3 deeper into the installation groove 11, so that the two floor slab bodies 1 can be brought closer to each other and fit tightly together. As the two floor slabs 1 approach each other, the trapezoidal frame 22 on one of the locking mechanisms 2 inserts into the trapezoidal groove 15 inside the other floor slab 1. The two inclined sides 23 on the trapezoidal frame 22 cooperate with the top and bottom inner walls of the trapezoidal groove 15 on the other floor slab 1, providing guidance. This allows the two floor slabs 1 to be tightly connected via multiple sets of locking mechanisms 2 and U-shaped steel bars 3, ensuring that the tops and bottoms of the two floor slabs 1 are flush. After the two floor slabs 1 are tightly connected, concrete is poured into the connection point through multiple injection ports 16 and vibrated. Once the concrete at the connection point has solidified, the assembly of the two floor slabs 1 is complete. At this point, the connection state of the two floor slabs 1 is as follows: Figure 1 As shown.

[0030] In summary, this application has the following advantages: Reliable connection and anti-loosening: The use of a one-way bearing 25 in conjunction with the locking mechanism 2 ensures that the U-shaped steel bar 3 cannot be loosened in the reverse direction after being tightened, thus ensuring a long-lasting and stable connection.

[0031] Easy to install and requires no complicated equipment: tightening can be completed with just an Allen wrench, resulting in high on-site construction efficiency.

[0032] Precise positioning ensures flatness: The trapezoidal frame 22 and the trapezoidal groove 15 are matched by their beveled sides, and automatically guided and aligned during the tightening process to ensure that the top and bottom surfaces of the two floor slabs are flush.

[0033] High structural strength: The locking mechanism 2 and the U-shaped steel bar 3 form a mechanical connection, and then the whole is formed by the post-poured concrete, which has the advantages of both dry and wet connection.

[0034] Modular design facilitates production and transportation: the locking mechanism 2 and the strip steel bar 4 are detachable components, and the main floor slab 1 can be prefabricated in a standardized manner and quickly assembled on site.

[0035] Wide range of applications: Suitable for prefabricated buildings where high requirements are placed on the strength and flatness of floor slab connections. The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A modular prefabricated building floor slab structure, comprising a floor slab body (1), characterized in that: The floor slab body (1) is provided with multiple locking mechanisms (2) and multiple U-shaped steel bars (3) arranged at equal intervals on both sides. The multiple locking mechanisms (2) and multiple U-shaped steel bars (3) located on both sides of the floor slab body (1) are all centrally symmetrically distributed. The locking mechanism (2) includes a box (21) that can be detachably installed on the floor slab body (1). The box (21) has a rotating column (26) that rotates in one direction. Two paddles (27) that are centrally symmetrically distributed are fixedly installed on the side of the rotating column (26). A rectangular opening (24) is opened on the side of the box (21).

2. The modular prefabricated building floor slab structure according to claim 1, characterized in that: The floor slab body (1) has trapezoidal grooves (15) on both sides. On the side of the two trapezoidal grooves (15) that are close to each other, there are multiple installation slots (11) that are evenly distributed. The boxes (21) on the multiple locking mechanisms (2) are respectively installed in the corresponding installation slots (11).

3. The modular prefabricated building floor slab structure according to claim 2, characterized in that: The box (21) is fixedly installed with a trapezoidal frame (22) on one side of the rectangular opening (24). The trapezoidal frame (22) has two inclined sides (23) that are adapted to the inner wall of the top and bottom of the mounting groove (11).

4. A modular prefabricated building floor slab structure according to claim 2, characterized in that: The top of the rotating column (26) is fixedly installed with an internal hexagonal sleeve (28). The internal hexagonal sleeve (28) passes through the top of the box (21) and is rotatably connected to the box (21). An adjustment hole (14) is provided on the top inner wall of the mounting groove (11). The adjustment hole (14) is coaxially arranged with the internal hexagonal sleeve (28) below.

5. A modular prefabricated building floor slab structure according to claim 1, characterized in that: The bottom end of the rotating column (26) is connected to the inner wall of the bottom of the housing (21) by a one-way bearing (25). The one-way bearing (25) includes an inner ring and an outer ring. The outer ring of the one-way bearing (25) is fixedly sleeved on the rotating column (26). The outer ring of the one-way bearing (25) is fixedly connected to the inner wall of the bottom of the housing (21).

6. A modular prefabricated building floor slab structure according to claim 2, characterized in that: The mounting groove (11) has a slot (12) on the inner wall away from the opening. The box (21) has an ear plate (29) fixedly installed on the side away from the opening of the mounting groove (11). The floor slab body (1) has two through holes (13), which are connected to the corresponding slots (12). Both through holes (13) have strip steel bars (4) inside, and the two strip steel bars (4) pass through the corresponding ear plates (29).

7. A modular prefabricated building floor slab structure according to claim 2, characterized in that: The trapezoidal groove (15) has multiple filling ports (16) evenly spaced on its top inner wall, and the mounting groove (11) and filling ports (16) on the same side are staggered.

8. A modular prefabricated building floor slab structure according to claim 1, characterized in that: The U-shaped steel bar (3) is integrally cast with the floor slab body (1), and the locking mechanism (2) and the strip steel bar (4) are detachably connected and assembled with the floor slab body (1).

Images