Prefabricated composite floor slab connection device and connection method

Abstract

The present invention relates to the technical field of prefabricated buildings, and in particular to a prefabricated composite floor slab connection device, comprising: a first composite floor slab, a second composite floor slab is arranged on one side of the first composite floor slab, and a limit rod is inserted between the first composite floor slab and the second composite floor slab; a lifting mechanism, the lifting mechanism is located at the top of the first composite floor slab and the second composite floor slab and is used to facilitate the lifting of the first composite floor slab and the second composite floor slab, and the lifting mechanism includes a threaded component, a closing component and a positioning component; the setting of the lifting mechanism can facilitate the user to lift the first composite floor slab and the second composite floor slab after splicing, so that the construction time will not be delayed during large-scale construction, the overall project progress will not be easily affected, the risk of accidents during the construction process is reduced, and at the same time, the problem of needing to purchase more complex lifting equipment or tools in order to overcome the inconvenience of lifting in traditional devices is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated buildings, and in particular to a prefabricated composite floor slab connection device and a connection method. Background Art

[0002] Prefabricated composite floor is a building component, usually made of concrete or a composite of concrete and steel bars, with high strength and rigidity. It is prefabricated in the factory and then transported to the construction site for installation, which can effectively shorten the construction period and improve the efficiency of building construction. The design of prefabricated composite floor usually adopts a modular form, so that it can be flexibly combined according to the needs of different buildings. At the same time, it also has good fire resistance, sound insulation and bearing capacity. It is a commonly used floor component in modern engineering and is widely used in residential, commercial and industrial buildings.

[0003] When using the traditional device, concrete is first poured at the joints of the composite floor slabs to combine the adjacent floor slabs and form an integral structure through concrete pouring, thereby improving the strength and rigidity of the joints. Connectors (such as steel bars, steel plates, bolts, etc.) are used to fix the adjacent prefabricated composite floor slabs together, and then overlapping parts are designed at the edges of the floor slabs. The adjacent plates are overlapped to form a continuous surface. Plug-in components are designed at the joints of the prefabricated floor slabs to allow the plates to be connected by latches, tenons, etc., which can simplify the installation process and optimize the structural performance. However, the traditional device is not convenient for lifting the prefabricated composite floor slabs, which will prolong the construction time during large-scale construction and affect the overall project progress. The inconvenience of lifting will cause workers to use unsafe methods to assemble or adjust during operation, increasing the risk of accidents during construction. At the same time, in order to overcome the inconvenience of lifting, it is necessary to purchase more complex lifting equipment or tools, which increases the project budget and construction cost. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a prefabricated composite floor slab connection device, which solves the technical problem that it is inconvenient to lift the prefabricated composite floor slab, which will prolong the construction time during large-scale construction and affect the overall project progress.

[0006] (II) Technical solution

[0007] In order to achieve the above object, the present invention provides a prefabricated composite floor slab connection device, comprising:

[0008] A first composite floor slab, a second composite floor slab being arranged on one side of the first composite floor slab, and a limit rod being inserted between the first composite floor slab and the second composite floor slab;

[0009] A lifting mechanism, wherein the lifting mechanism is located at the top of the first composite floor and the second composite floor and is used to facilitate the lifting of the first composite floor and the second composite floor, the lifting mechanism comprises a threaded assembly, a closing assembly and a positioning assembly, the threaded assembly is located at the top of the first composite floor and the second composite floor and is used to connect the closing assembly, the closing assembly is located at the top of the threaded assembly and is used to facilitate the user to lift the first composite floor and the second composite floor, and the positioning assembly is located inside the closing assembly and is used to position the closing assembly.

[0010] Optionally, the threaded assembly includes a threaded hole opened on the top of the first composite floor and the second composite floor, a screw is threaded inside the threaded hole, a connecting rod is fixed to the top of the screw, and a plurality of evenly distributed hexagonal holes are opened on the top of the screw.

[0011] Optionally, the closing assembly includes a lifting seat fixed to the top of the connecting rod, the lifting seat has a baffle fixed inside, and an opening and closing plate is hinged on one side of the lifting seat.

[0012] Optionally, the positioning assembly includes two positioning blocks fixed at the bottom of the opening and closing plate, a groove body for accommodating the positioning blocks is provided at the bottom of the lifting seat, a receiving groove is provided on one side of the groove body, a movable sleeve is provided inside the receiving groove, a positioning rod is fixed on one side of the movable sleeve, the positioning rod extends to the interior of the groove body and is plugged into the positioning blocks, a spring is connected between the movable sleeve and the receiving groove, and a control rod is fixed on one side of the movable sleeve.

[0013] Optionally, a connecting mechanism is provided between the first composite floor and the second composite floor to connect them, and the connecting mechanism includes a connecting block and a connecting seat respectively fixed to the top of the first composite floor and the second composite floor, and bolts threadedly connected to the connecting block are provided inside the connecting seat, and a protective component for protecting the bolts is provided on one side of the connecting seat.

[0014] Optionally, the protective component includes a protective shell fixed to one side of the connecting seat, a rotating plate is hinged on one side of the protective shell, and a resistance component for resisting the rotating plate is provided between the rotating plate and the protective shell.

[0015] Optionally, the interference assembly includes a rotating column rotatably mounted on one side of the protective shell, a interference rod is fixed to one side of the rotating column, the interference rod cooperates with the rotating plate, a groove cavity is provided inside the protective shell, and a torsion spring is connected between the rotating column and the groove cavity.

[0016] Optionally, a limiting mechanism for limiting the bolt is arranged between the protective shell and the bolt, the limiting mechanism includes a slide groove opened at the bottom of the protective shell and a slide bar installed in the slide groove, a contact plate matching with the bolt is fixed to the top of the slide bar, a control board is fixed to one side of the contact plate, a contact seat is fixed to one side of the protective shell, a roller matching with the control board is installed inside the contact seat, the control board extends to one side of the protective shell and is provided with a plug-in component for plugging the control board.

[0017] Optionally, the plug-in assembly includes a fixed plate fixed on one side of the protective shell and a plug-in plate plugged into the fixed plate, the control panel is provided with two sockets for inserting the plug-in plate, the plug-in plate extends to the top of the fixed plate and is fixed with a counterweight block, two blocks are fixed to the bottom of the counterweight block, and the top of the fixed plate is provided with two grooves for inserting the blocks.

[0018] A method for connecting prefabricated composite floor slabs comprises the following steps:

[0019] S1. Construction preparation: Check the number, quantity and position of the first composite floor slab and the second composite floor slab to ensure that they meet the design requirements;

[0020] S2. Laying out and positioning: Laying out the lines according to the construction drawings at the construction site, accurately marking the installation positions of the first composite floor slab and the second composite floor slab to ensure the accuracy of the installation;

[0021] S3, connection and assembly: connect the first composite floor slab and the second composite floor slab through a connection mechanism to ensure that they are firmly assembled;

[0022] S4, reinforcement: reinforcing the connection mechanism (3) between the first composite floor slab and the second composite floor slab through a limiting mechanism to make it more stable during operation;

[0023] S5. Support and construction: Install the lifting mechanism on the top of the first composite floor and the second composite floor, and check whether the lifting seat is firmly installed to ensure stability without shaking during the lifting process.

[0024] (III) Beneficial effects

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention can facilitate users to lift the first composite floor slab and the second composite floor slab after splicing by setting the lifting mechanism, so that the construction time will not be delayed during large-scale construction, and the overall project progress will not be easily affected. It also avoids the situation that workers adopt unsafe methods to assemble or adjust during the operation due to inconvenient lifting, reduces the risk of accidents during the construction process, and solves the problem that in order to overcome the inconvenience of lifting in traditional devices, more complicated lifting equipment or tools need to be purchased, which increases the project budget and construction cost;

[0027] 2. The present invention can realize the rapid connection between the first composite floor slab and the second composite floor slab through the setting of the connecting mechanism, which can significantly improve the integrity of the structure, reduce the structural risk caused by the insufficient strength of a single floor slab, greatly improve the stability and durability of the building, and at the same time achieve a tight connection so that the floors can work together during an earthquake, reduce relative sliding and vibration, improve the seismic resistance of the overall structure, and ensure the safety of the building during an earthquake.

[0028] 3. The present invention can limit the bolts in the connecting mechanism by setting a limiting mechanism, making it more stable after installation, reducing position deviation, avoiding poor connection due to errors, thereby ensuring the accuracy of the structure, and simplifying the construction operation, making the installation process smoother. At the same time, it helps to protect the key connection nodes in the structure, prevent the key nodes from being damaged due to improper operation or accidental collision during the construction process, and ensure its long-term functional stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the connecting mechanism of the present invention when it is disassembled;

[0031] Figure 3 is a cross-sectional view of the protective shell of the present invention;

[0032] Figure 4 It is a structural schematic diagram of the bolt of the present invention;

[0033] Figure 5 It is a structural schematic diagram of the limiting mechanism of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the disassembled limiting mechanism of the present invention;

[0035] Figure 7 It is a structural schematic diagram of the lifting mechanism of the present invention;

[0036] Figure 8 It is a structural schematic diagram of the lifting seat of the present invention;

[0037] Fig. 9 A cross-sectional view of the lifting seat of the present invention

[0038] Fig.10 Flow chart of the method of the present invention.

[0039] [Description of Reference Numerals]

[0040] 1. First composite floor; 2. Second composite floor; 3. Connecting mechanism; 4. Lifting mechanism; 5. Limiting mechanism; 6. Limiting rod;

[0041] 31. Connecting block; 32. Bolt; 33. Connecting seat; 34. Protective shell; 35. Rotating plate; 36. Rejection rod; 37. Torsion spring; 38. Rotating column;

[0042] 41. Screw rod; 42. Connecting rod; 43. Lifting seat; 44. Opening and closing plate; 45. Positioning block; 46. Baffle; 47. Positioning rod; 48. Spring; 49. Control rod;

[0043] 51. Resistance plate; 52. Control plate; 53. Resistance seat; 54. Counterweight block; 55. Sliding bar; 56. Roller; 57. Fixed plate; 58. Insert plate. DETAILED DESCRIPTION

[0044] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0045] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0046] refer to Figure 1 , Figure 7 , Figure 8 and Fig. 9 , a prefabricated composite floor slab connection device, comprising:

[0047] A first composite floor 1, a second composite floor 2 is arranged on one side of the first composite floor 1, and a limit rod 6 is inserted between the first composite floor 1 and the second composite floor 2;

[0048] The lifting mechanism 4 is located at the top of the first composite floor 1 and the second composite floor 2 and is used to facilitate the lifting of the first composite floor 1 and the second composite floor 2. The lifting mechanism 4 includes a threaded component, a closing component and a positioning component. The threaded component is located at the top of the first composite floor 1 and the second composite floor 2 and is used to connect the closing component. The closing component is located at the top of the threaded component and is used to facilitate the user to lift the first composite floor 1 and the second composite floor 2. The positioning component is located inside the closing component and is used to position the closing component. The threaded component includes a threaded hole opened at the top of the first composite floor 1 and the second composite floor 2. The inside of the threaded hole is screwed with a screw 41, and the top of the screw 41 is fixed There is a connecting rod 42, and a plurality of evenly distributed hexagonal holes are provided on the top of the screw rod 41. The closing component includes a lifting seat 43 fixed on the top of the connecting rod 42. The lifting seat 43 has a baffle 46 fixed inside the lifting seat 43, and an opening and closing plate 44 is hinged on one side of the lifting seat 43. The positioning component includes two positioning blocks 45 fixed on the bottom of the opening and closing plate 44. A groove body for accommodating the positioning blocks 45 is provided at the bottom of the lifting seat 43, a receiving groove is provided on one side of the groove body, a moving sleeve is provided inside the receiving groove, a positioning rod 47 is fixed on one side of the moving sleeve, the positioning rod 47 extends to the inside of the groove body and is plugged into the positioning block 45, a spring 48 is connected between the moving sleeve and the receiving groove, and a control rod 49 is fixed on one side of the moving sleeve.

[0049] First, the screw rod 41 is screwed to the threaded hole through the hexagonal hole to support the lifting seat 43, and then the control rod 49 is pulled to drive the movable sleeve to move, and the movement of the movable sleeve drives the spring 48 to contract, and the contraction of the spring 48 makes the movable sleeve drive the positioning rod 47 to move, and the positioning rod 47 is moved to separate it from the positioning block 45. After the positioning rod 47 and the positioning block 45 are separated from each other, the opening and closing plate 44 is rotated to open the lifting seat 43, and then the lifting rope is connected to the lifting seat 43, and the baffle 46 cooperates with the lifting rope to make the lifting rope more stable in the lifting seat 43, so as to facilitate the lifting of the first composite floor 1 and the second composite floor 2 after splicing, so that the construction time will not be delayed during large-scale construction, and the overall project progress will not be easily affected. It also avoids the situation where the inconvenience of lifting causes workers to assemble or adjust by unsafe methods during operation, thereby reducing the risk of accidents during construction.

[0050] refer to Figure 1 , Figure 2 and Figure 3A connecting mechanism 3 is provided between the first composite floor 1 and the second composite floor 2 to connect them. The connecting mechanism 3 includes a connecting block 31 and a connecting seat 33 respectively fixed on the top of the first composite floor 1 and the second composite floor 2. A bolt 32 screwed to the connecting block 31 is provided inside the connecting seat 33, and a protective component for protecting the bolt 32 is provided on one side of the connecting seat 33. The protective component includes a protective shell 34 fixed on one side of the connecting seat 33, a rotating plate 35 is hinged on one side of the protective shell 34, and a resistance component for resisting the rotating plate 35 is provided between the rotating plate 35 and the protective shell 34. The resistance component includes a rotating column 38 rotatably installed on one side of the protective shell 34, a resistance rod 36 is fixed on one side of the rotating column 38, and the resistance rod 36 cooperates with the rotating plate 35. A groove cavity is provided inside the protective shell 34, and a torsion spring 37 is connected between the rotating column 38 and the groove cavity.

[0051] The connecting block 31 is aligned with the connecting seat 33 so that the connecting block 31 is inserted into the connecting seat 33, and the resistance rod 36 is rotated to drive the torsion spring 37 to twist. Through the twisting of the torsion spring 37, the resistance rod 36 is separated from the rotating plate 35. After the resistance rod 36 and the rotating plate 35 are separated from each other, the rotating plate 35 is rotated to open the protective shell 34, and the connecting block 31 and the connecting seat 33 are screwed together by the bolt 32. Then, the resistance rod 36 is loosened, and the resistance rod 36 is driven to reset by the elastic force of the torsion spring 37. Through the reset of the resistance rod 36, it is caused to conflict with the rotating plate 35, so that the rotating plate 35 can be limited to prevent it from rotating easily. By screwing the connecting block 31 and the connecting seat 33, the first composite floor 1 and the second composite floor 2 can be quickly connected, which can significantly improve the integrity of the structure, reduce the structural risk caused by insufficient strength of a single floor, and greatly improve the stability and durability of the building.

[0052] refer to Figure 4 , Figure 5 and Figure 6A limiting mechanism 5 for limiting the bolt 32 is provided between the protective shell 34 and the bolt 32. The limiting mechanism 5 includes a slide groove provided at the bottom of the protective shell 34 and a slide bar 55 installed inside the slide groove. A contact plate 51 matching with the bolt 32 is fixed on the top of the slide bar 55. A control board 52 is fixed on one side of the contact plate 51. A contact seat 53 is fixed on one side of the protective shell 34. A roller 56 matching with the control board 52 is installed inside the contact seat 53. The control board 52 extends to one side of the protective shell 34 and is provided with a plug-in assembly for plugging the control board 52. The plug-in assembly includes a fixed plate 57 fixed to one side of the protective shell 34 and a plug-in plate 58 plugged into the fixed plate 57. Two plug-in holes for the plug-in plate 58 are provided inside the control board 52. The plug-in plate 58 extends to the top of the fixed plate 57 and is fixed with a counterweight 54. Two blocks are fixed at the bottom of the counterweight 54. Two grooves for the blocks to be inserted are provided at the top of the fixed plate 57.

[0053] When the bolt 32 needs to be rotated, the counterweight block 54 is first pulled to drive the plug plate 58 to move, and the plug plate 58 is separated from the plug hole through the movement, and then the control plate 52 is pulled. Through the setting of the roller 56, the control plate 52 is smoother in the process of movement, and it will not easily shake or deviate. The movement of the control plate 52 drives the movement of the contact plate 51. Through the mutual cooperation of the slide bar 55 and the slide groove, the contact plate 51 is more stable in the process of movement. Through the movement of the contact plate 51, it is separated from the bolt 32, so that the limitation of the bolt 32 can be cancelled. Through the mutual cooperation between the contact plate 51 and the bolt 32, poor connection caused by error can be avoided, thereby ensuring the accuracy of the structure, simplifying the construction operation, and making the installation process smoother.

[0054] Please refer to Fig.10 , a method for connecting prefabricated composite floor slabs, comprising the following steps:

[0055] S1. Construction preparation: Check the number, quantity and position of the first composite floor 1 and the second composite floor 2 to ensure that they meet the design requirements;

[0056] S2. Laying out and positioning: Laying out and positioning according to the construction drawings at the construction site, accurately marking the installation positions of the first composite floor 1 and the second composite floor 2 to ensure the accuracy of the installation;

[0057] S3, connection and assembly: connect the first composite floor 1 and the second composite floor 2 through the connection mechanism 3 to ensure that they are firmly assembled;

[0058] S4, reinforcement: the connection mechanism 3 between the first composite floor 1 and the second composite floor 2 is reinforced by the limiting mechanism 5 to make it more stable during the working process;

[0059] S5. Support and construction: Install the lifting mechanism 4 on the top of the first composite floor 1 and the second composite floor 2, and check whether the lifting seat 43 is firmly installed to ensure that it is stable and without shaking during the lifting process.

[0060] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0061] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present invention, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0063] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A prefabricated composite floor connection device, characterized in that: include: A first composite floor slab (1), a second composite floor slab (2) being arranged on one side of the first composite floor slab (1), and a limit rod (6) being inserted between the first composite floor slab (1) and the second composite floor slab (2); A lifting mechanism (4), the lifting mechanism (4) being located at the top of the first composite floor (1) and the second composite floor (2) and being used to facilitate lifting of the first composite floor (1) and the second composite floor (2), the lifting mechanism (4) comprising a threaded component, a closing component and a positioning component, the threaded component being located at the top of the first composite floor (1) and the second composite floor (2) and being used to connect the closing component, the closing component being located at the top of the threaded component and being used to facilitate a user to lift the first composite floor (1) and the second composite floor (2), the positioning component being located inside the closing component and being used to position the closing component; A connecting mechanism (3) is provided between the first composite floor slab (1) and the second composite floor slab (2) for connecting them, the connecting mechanism (3) comprising a connecting block (31) and a connecting seat (33) respectively fixed to the top of the first composite floor slab (1) and the top of the second composite floor slab (2), a bolt (32) threadedly connected to the connecting block (31) is provided inside the connecting seat (33), and a protective component for protecting the bolt (32) is provided on one side of the connecting seat (33); The protective component comprises a protective shell (34) fixed to one side of the connecting seat (33); a rotating plate (35) is hingedly connected to one side of the protective shell (34); and a resisting component for resisting the rotating plate (35) is provided between the rotating plate (35) and the protective shell (34); A limiting mechanism (5) for limiting the position of the bolt (32) is provided between the protective shell (34) and the bolt (32), the limiting mechanism (5) comprising a slide groove provided at the bottom of the protective shell (34) and a slide bar (55) installed inside the slide groove, a contact plate (51) matched with the bolt (32) is fixed on the top of the slide bar (55), a control board (52) is fixed on one side of the contact plate (51), a contact seat (53) is fixed on one side of the protective shell (34), a roller (56) matched with the control board (52) is installed inside the contact seat (53), and the control board (52) extends to one side of the protective shell (34) and is provided with a plug-in assembly for plugging the control board (52); The plug-in assembly comprises a fixing plate (57) fixed to one side of the protective shell (34) and an inserting plate (58) inserted into the fixing plate (57); two inserting holes for inserting the inserting plate (58) are provided inside the control board (52); the inserting plate (58) extends to the top of the fixing plate (57) and is fixed with a counterweight (54); two blocks are fixed to the bottom of the counterweight (54); and two grooves are provided on the top of the fixing plate (57) for inserting the blocks.

2. A prefabricated composite floor connection device as claimed in claim 1, characterized in that: The threaded assembly comprises threaded holes formed on the tops of the first composite floor slab (1) and the second composite floor slab (2), a screw rod (41) being threadedly connected inside the threaded hole, a connecting rod (42) being fixed on the top of the screw rod (41), and a plurality of evenly distributed hexagonal holes being formed on the top of the screw rod (41).

3. A prefabricated composite floor connection device as claimed in claim 2, characterized in that: The closing assembly comprises a lifting seat (43) fixed on the top of the connecting rod (42), a baffle (46) being fixed inside the lifting seat (43), and an opening and closing plate (44) being hingedly connected to one side of the lifting seat (43).

4. A prefabricated composite floor slab connection device as claimed in claim 3, characterized in that: The positioning assembly comprises two positioning blocks (45) fixed at the bottom of the opening and closing plate (44); a groove body for accommodating the positioning blocks (45) is provided at the bottom of the lifting seat (43); a receiving groove is provided on one side of the groove body; a movable sleeve is provided inside the receiving groove; a positioning rod (47) is fixed on one side of the movable sleeve; the positioning rod (47) extends into the interior of the groove body and is plugged into the positioning blocks (45); a spring (48) is connected between the movable sleeve and the receiving groove; and a control rod (49) is fixed on one side of the movable sleeve.

5. A prefabricated composite floor slab connection device as claimed in claim 1, characterized in that: The abutment assembly comprises a rotating column (38) rotatably mounted on one side of the protective shell (34); a abutment rod (36) is fixed to one side of the rotating column (38); the abutment rod (36) cooperates with a rotating plate (35); a groove cavity is provided inside the protective shell (34); a torsion spring (37) is connected between the rotating column (38) and the groove cavity.

6. A method for connecting a prefabricated composite floor slab according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Construction preparation: Check the number, quantity and position of the first composite floor slab (1) and the second composite floor slab (2) to ensure that they meet the design requirements; S2. Laying out and positioning: Laying out and positioning according to the construction drawings at the construction site, accurately marking the installation positions of the first composite floor slab (1) and the second composite floor slab (2) to ensure the accuracy of the installation; S3, connection and assembly: connecting the first composite floor slab (1) and the second composite floor slab (2) through the connection mechanism (3) to ensure that they are firmly assembled; S4, reinforcement: reinforcing the connection mechanism (3) between the first composite floor slab (1) and the second composite floor slab (2) through a limiting mechanism (5) to make the connection mechanism (3) more stable during operation; S5. Support and erection: Install the lifting mechanism (4) on the top of the first composite floor (1) and the second composite floor (2), and check whether the lifting seat (43) is firmly installed to ensure that it is stable and without shaking during the lifting process.

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