Hollow floor system inner mold and device for preventing hollow slab inner mold from floating upwards

By binding the fixed reinforcing bars to the roof structural reinforcing bar layer, the problem of the hollow slab inner formwork floating was solved, thus improving the stability of the hollow slab beam cross-sectional dimensions and construction efficiency.

CN223767021UActive Publication Date: 2026-01-06CHINA TIESIJU CIVIL ENGINEERING GROUP CO LTD +2
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Patent Information

Application Number
CN202520120715.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-20
Publication Date
2026-01-06
Estimated Expiration
2035-01-20

AI Technical Summary

Technical Problem

During the pouring of hollow core slabs, the inner formwork of the hollow slab is easily affected by buoyancy and floats up, causing changes in the beam cross-sectional dimensions and requiring frequent adjustments to its position.

Method used

The steel reinforcement is fixed to the inner formwork base using a fixed steel reinforcement and inner formwork base fixing component, and the steel reinforcement layer is fixed to the roof structure steel reinforcement layer by threaded rods and steel wires to ensure the stability of the inner formwork base position.

Benefits of technology

It effectively prevents the inner formwork from floating due to buoyancy, maintains the stability of the cross-sectional dimensions of the hollow slab beam, reduces construction adjustments, and improves the stability of the reinforcement layer.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a hollow floor system inner mold and a device for preventing the hollow floor system inner mold from floating upwards, the device for preventing the hollow floor system inner mold from floating upwards comprises a fixing steel bar between two roof construction steel bar layers, and a fixing mechanism is arranged on the fixing steel bar and comprises an inner mold base fixing assembly arranged on the fixing steel bar and an outer mold base fixing assembly arranged on the fixing steel bar; the inner mold base fixing assembly is used for installing a fixing steel bar on the hollow slab inner mold. The reinforcing steel bar layer fixing assembly is arranged on the fixing reinforcing steel bars, the reinforcing steel bar layer fixing assembly is used for fixing the fixing reinforcing steel bars and a roof construction reinforcing steel bar layer and is fixed to the fixing reinforcing steel bars through second steel wires on the connecting groove seats in the middle of the inner mold base, and the fixing reinforcing steel bars are bound to the frame through first steel wires, so that the fixing reinforcing steel bars can be fixed to the inner mold base; and through binding of third steel wires and constructional steel bar layers, the fixing steel bars and the roof constructional steel bar layers are fixed together, so that it is guaranteed that the positions, on the two roof constructional steel bar layers, of the inner mold base can be kept unchanged, and the inner mold base is prevented from moving due to buoyancy.
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Description

Technical Field

[0001] This application relates to the field of building construction, and in particular to a hollow floor slab inner mold and a device for preventing the hollow slab inner mold from floating. Background Technology

[0002] Hollow core slabs are a type of cast-in-place reinforced concrete hollow core slab. Hollow core slab technology can reduce the self-weight of the slab while maintaining most of its rigidity and strength. It is a high-tech building structure system with superior performance and price, and is more in line with human needs. It has great socio-economic value. Buildings using hollow core slab technology have many performance advantages that are unmatched by ordinary slab technology.

[0003] However, during the implementation of the relevant technical solutions, at least the following technical problems were found: During the pouring of hollow floor slabs, the inner formwork of the hollow floor slab is placed between the roof structural steel reinforcement layers before concrete is poured. As the concrete is poured, the buoyancy of the inner formwork of the hollow floor slab increases, making it easy to float up and causing changes in the cross-sectional dimensions of the hollow slab beam. Therefore, it is necessary to adjust the position of the inner formwork of the hollow slab. Utility Model Content

[0004] This application provides a hollow floor slab inner mold and a device for preventing the hollow slab inner mold from floating, which solves the problem of the hollow slab inner mold being affected by buoyancy in the prior art and achieves the effect of limiting the hollow slab inner mold.

[0005] This application provides a hollow slab inner formwork and a device for preventing the hollow slab inner formwork from floating, including a fixing reinforcing bar between two roof structural steel reinforcement layers. The fixing reinforcing bar is provided with a fixing mechanism, which includes: an inner formwork base fixing component disposed on the fixing reinforcing bar and used to install the fixing reinforcing bar on the hollow slab inner formwork; and a steel reinforcement layer fixing component disposed on the fixing reinforcing bar and used to fix the fixing reinforcing bar to the roof structural steel reinforcement layer.

[0006] Furthermore, the rebar fixing assembly includes: a movable seat, movably connected to the outside of the fixed rebar; a fixing sleeve, fixedly disposed on the top of the movable seat; a threaded rod, threadedly connected to the top of the fixing sleeve; and a third steel wire, disposed on the top of the threaded rod, and the threaded rod is installed together with the roof structural rebar layer through the third steel wire.

[0007] Furthermore, the rebar fixing assembly further includes: two limiting rods, which are inserted and connected to both sides of the movable seat, and one end of the two limiting rods is in contact with the fixed rebar; a fixing block, which is disposed on the outer end of the limiting rods; and a spring, which is sleeved on the outer side of the limiting rods, and both ends of the spring are fixedly connected to the movable seat and the fixing block, respectively.

[0008] This application provides a hollow floor slab inner mold, which is limited by a device for preventing the hollow floor slab inner mold from floating as described in any one of the claims. The hollow floor slab inner mold includes an inner mold base between two roof structural steel reinforcement layers. The outer side of the inner mold base is provided with a frame, and the middle part of the inner mold base is provided with a connecting groove. The top of the inner mold base is provided with a plurality of grooves, and the plurality of grooves are connected to the groove of the connecting groove. The fixing steel bar is disposed inside one of the grooves.

[0009] Furthermore, the frame has multiple holes, the fixing reinforcing bars are disposed at the top of two of the holes, the inner mold base fixing assembly includes two first steel wires, the two first steel wires are respectively disposed inside the two holes, and the frame is installed together with the fixing reinforcing bars through the first steel wires.

[0010] Furthermore, a connecting rod is provided inside the groove of the connecting slot seat, and a second steel wire is sleeved on the outer side of the middle part of the fixing steel bar, with the bottom of the second steel wire sleeved on the connecting rod.

[0011] The technical solution provided in this application has at least the following technical effects or advantages:

[0012] The second steel wire is fixed to the fixed reinforcing bar in the middle of the inner formwork base by connecting the groove seat. The fixed reinforcing bar is tied to the frame with the first steel wire, so that the fixed reinforcing bar can be fixed together with the inner formwork base. Then, by rotating the threaded rod, the third steel wire is brought close to the roof structural steel reinforcement layer and fixed thereto, thus fixing the fixed reinforcing bar together with the roof structural steel reinforcement layer. This ensures that the position of the inner formwork base in the two roof structural steel reinforcement layers remains unchanged, preventing the buoyancy of the inner formwork base from causing it to move during concrete pouring. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the device for preventing the inner mold of the hollow plate from floating in the embodiments of this application;

[0014] Figure 2 This is a schematic diagram of the hollow plate inner mold in the embodiments of this application;

[0015] Figure 3 This is a structural schematic diagram of the steel reinforcement layer fixing assembly in an embodiment of this application;

[0016] Figure 4 This is a cross-sectional structural diagram of the movable seat in an embodiment of this application;

[0017] In the diagram: 10. Roof structural steel reinforcement layer; 20. Inner formwork base; 21. Groove; 30. Frame; 31. Hole; 40. Connecting groove base; 50. Fixed steel reinforcement; 60. Fixing mechanism; 61. Inner formwork base fixing component; 62. Steel reinforcement layer fixing component; 611. First steel wire; 612. Second steel wire; 621. Movable seat; 622. Fixing sleeve; 623. Threaded rod; 624. Third steel wire; 625. Limiting rod; 626. Fixing block; 627. Spring. Detailed Implementation

[0018] This application discloses a hollow floor slab inner mold and a device for preventing the hollow slab inner mold from floating. By fixing the fixing steel bar 50 to the inner mold base 20 and the roof structural steel bar layer 10 at the top, the fixing steel bar 50 can limit the inner mold base 20 at the top, preventing the inner mold base 20 from moving due to the buoyancy during concrete pouring, which would cause changes in the cross-sectional dimensions of the hollow slab beam.

[0019] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0020] Example 1

[0021] Please refer to Figure 1 and Figure 2 This embodiment provides a hollow floor slab inner mold, including an inner mold base 20 between two roof structural steel reinforcement layers 10. The inner mold base 20 is a hollow structure, filled with lightweight material. A frame 30 is provided on the outer side of the inner mold base 20. The inner mold base 20 and the frame 30 can be separated from the middle. The inner mold base 20 and the frame 30 are assembled into a sealed whole by two identical templates connected by screws around their perimeter. A pad is provided at the bottom of the inner mold base 20, which raises the inner mold base 20 so that it is positioned at a corresponding height between the two roof structural steel reinforcement layers 10. A connecting groove 40 is provided in the middle of the inner mold base 20, and the groove on the connecting groove 40 connects the inner mold base 20... The top and bottom are connected, allowing concrete to flow from the opening of the connecting groove 40 to the bottom of the inner formwork 20. The inner wall of the opening of the connecting groove 40 is sealed, preventing concrete from entering the interior of the inner formwork 20 and maintaining its hollowness. Multiple grooves 21 are provided in the middle of the top of the inner formwork 20, and these grooves 21 are connected to the opening of the connecting groove 40. Multiple holes 31 are provided on the frame 30. The hollow inner formwork 20 can greatly reduce the self-weight of the floor slab. Furthermore, the inner formwork 20 is located between the two roof structural steel reinforcement layers 10, which can greatly reduce the amount of steel reinforcement and concrete used, shorten the construction period, reduce construction costs, and achieve the goal of reducing project costs.

[0022] Example 2

[0023] Please refer to Figure 1 and Figure 2 This embodiment provides a device for preventing the inner mold of a hollow slab from floating, including a fixing reinforcing bar 50 between two roof structural reinforcing bar layers 10. The fixing reinforcing bar 50 is disposed inside one of the grooves 21, and a fixing mechanism 60 is provided on the fixing reinforcing bar 50. The fixing mechanism 60 includes: an inner mold base fixing assembly 61, disposed on the fixing reinforcing bar 50, and used to install the fixing reinforcing bar 50 on the hollow slab inner mold; and a reinforcing bar layer fixing assembly 62, disposed on the fixing reinforcing bar 50, and used to... The fixing steel bar 50 is fixed to the roof structural steel bar layer 10. The inner formwork fixing component 61 and the steel bar fixing component 62 can be connecting steel wires. The fixing steel bar 50 is tied together with the inner formwork 20 and the top roof structural steel bar layer 10 by the connecting steel wires, thereby fixing the position of the inner formwork 20 and the top roof structural steel bar layer 10. The fixing steel bar 50 close to the inner formwork 20 can resist the inner formwork 20 and prevent the inner formwork 20 from moving upward due to the buoyancy of the concrete pouring, thereby affecting the cross-sectional dimensions of the hollow slab beam.

[0024] Please refer to Figure 1 and Figure 2 The inner mold base fixing assembly 61 includes a first steel wire 611 and a second steel wire 612. Multiple holes 31 are provided on the frame 30. A fixing reinforcing bar 50 is disposed at the top of two holes 31. The first steel wire 611 is disposed inside the hole 31. The frame 30 is installed together with the fixing reinforcing bar 50 via the first steel wire 611. A connecting rod is disposed in the groove of the connecting slot 40. The second steel wire 612 is sleeved on the outer side of the middle part of the fixing reinforcing bar 50, and the bottom of the second steel wire 612 is sleeved on the connecting rod. The second steel wire 612 binds the fixing steel bar 50 together with the connecting rod in the groove of the connecting slot 40, thereby fixing the fixing steel bar 50 to the inner formwork seat 20. Together with the first steel wire 611 inside the frame 30, the fixing steel bar 50 is fixed to the frame 30, so that the fixing steel bar 50 is tightly attached to the top of the frame 30. The fixing steel bar 50 is fixed on the roof structural steel bar layer 10, which can hold the inner formwork seat 20 at the top, preventing the inner formwork seat 20 from moving upward due to the buoyancy during concrete pouring.

[0025] Please refer to Figures 1-4The rebar fixing assembly 62 includes a movable seat 621, a fixing sleeve 622, a threaded rod 623, a third steel wire 624, a limiting rod 625, a fixing block 626, and a spring 627. The movable seat 621 is movably connected to the outside of the fixed rebar 50. The fixing sleeve 622 is fixedly installed on the top of the movable seat 621. The threaded rod 623 is threadedly connected to the top of the fixing sleeve 622. The third steel wire 624 is installed on the top of the threaded rod 623, and the threaded rod 623 is installed together with the roof structural rebar layer 10 through the third steel wire 624. Two limiting rods 625 are inserted and connected to both sides of the movable seat 621, with one end of each limiting rod 625 contacting and connecting to the fixed reinforcing bar 50. A fixing block 626 is disposed on the outer end of the limiting rod 625. A spring 627 is sleeved on the outer side of the limiting rod 625, with both ends of the spring 627 fixedly connected to the movable seat 621 and the fixing block 626, respectively. Through the elastic force of the spring 627 on the limiting rods 625 on both sides of the movable seat 621, the spring 627 can drive the limiting rod 625 to move towards the fixed reinforcing bar 50, causing the limiting rod 625 to abut against the fixed reinforcing bar 50. The fixed reinforcing bar 50 is fixed, and the movable seat 621 is fixed to the fixed reinforcing bar 50 to prevent changes in the angle and position of the movable seat 621 on the fixed reinforcing bar 50. By rotating the threaded rod 623 on the fixed sleeve 622, the position of the third steel wire 624 at the top of the threaded rod 623 can be changed. The top of the threaded rod 623 abuts against the structural reinforcing bar, which also brings the third steel wire 624 closer to the top roof structural reinforcing bar layer 10, reducing the distance between the third steel wire 624 and the structural reinforcing bar, so that the third steel wire 624 can be more tightly connected with the roof structural reinforcing bar layer. The 10 are tied together, thereby fixing the fixed steel bar 50 to the roof structural steel bar layer 10 at the top. The position of the fixed steel bar 50 is determined so that when the concrete is poured, the fixed steel bar 50 tightly attached to the top of the inner formwork 20 can abut against the inner formwork 20, preventing the inner formwork 20 from moving due to buoyancy. This ensures that the cross-sectional dimensions of the hollow slab beam will not change. It also allows the threaded rod 623 to support the roof structural steel bar layer 10, preventing the roof structural steel bar layer 10 from deforming due to falling objects and improving the stability of the roof structural steel bar layer 10.

[0026] The functional principle of this application can be explained through the following methods:

[0027] In use, place the inner mold base 20 on the pad to maintain a suitable height. Insert the fixing rebar 50 into the groove 21 at the top of the inner mold base 20. Sleeve the first steel wire 611 around the middle of the fixing rebar 50, and fix the bottom of the first steel wire 611 to the connecting rod in the groove of the connecting slot 40. Tie the fixing rebar 50 and the connecting rod together, and fix the fixing rebar 50 to the inner mold base 20. Finally, tie the first steel wire 611 inside the hole 31 to the fixing rebar 50. The frame 30 is fixed together with the fixed reinforcing bar 50, and the fixed reinforcing bar 50 is fixed on the inner formwork base 20 and the frame 30. The movable seat 621 is placed on the fixed reinforcing bar 50. The fixing blocks 626 on both sides are pulled, causing the fixing blocks 626 to move the limiting rod 625 outward, so that the limiting rod 625 will not block the fixed reinforcing bar 50. The movable seat 621 is moved so that the threaded rod 623 and the third steel wire 624 at the top of the movable seat 621 can be moved to the position of the bottom of the structural reinforcing bar on the roof structural reinforcing bar layer 10. The fixing blocks 621 are then released. 26. The elastic force of spring 627 causes the limiting rod 625 to abut against the fixed reinforcing bar 50, fixing the angle and position of the movable seat 621 on the fixed reinforcing bar 50. Rotate the threaded rod 623 so that the threaded rod 623 extends out of the fixing sleeve 622, so that the top of the threaded rod 623 abuts against the bottom of the structural reinforcing bar. The third steel wire 624 approaches the structural reinforcing bar and is then tied together with the structural reinforcing bar, thereby more tightly fixing the threaded rod 623 to the roof structural reinforcing bar layer 10, and confirming the connection between the fixed reinforcing bar 50 and the top roof. The distance between the roof structural steel reinforcement layer 10 and the threaded rod 623 supports the roof structural steel reinforcement layer 10 to prevent deformation of the roof structural steel reinforcement layer 10 due to falling objects, thereby improving the stability of the roof structural steel reinforcement layer 10. During concrete pouring, concrete is input from the groove of the connecting groove seat 40 to the bottom of the inner formwork seat 20. The inner formwork seat 20 is subjected to buoyancy, and the fixed steel bar 50 that is in close contact with the top of the inner formwork seat 20 can resist the inner formwork seat 20, thereby achieving the purpose of preventing the hollow slab inner formwork from floating and ensuring that the cross-sectional dimensions of the hollow slab beam do not change.

[0028] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

[0029] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application 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 application, based on the technical solution and concept of the present application, should be covered within the scope of protection of the present application.

Claims

1. A device for preventing the upward movement of a core in a hollow core panel, characterized in that, The device comprises a fixing steel bar (50) between two roof construction steel bar layers (10), a fixing mechanism (60) is arranged on the fixing steel bar (50), the fixing mechanism (60) comprises: an inner mold seat fixing assembly (61) arranged on the fixing steel bar (50), and the inner mold seat fixing assembly (61) is used for mounting the fixing steel bar (50) on a hollow slab inner mold; a steel bar layer fixing assembly (62) arranged on the fixing steel bar (50), and the steel bar layer fixing assembly (62) is used for fixing the fixing steel bar (50) and the roof construction steel bar layer (10).

2. A device for preventing the upward movement of a core in a hollow core panel as claimed in claim 1 wherein, The steel bar layer fixing assembly (62) comprises: a movable seat (621) movably connected to the outer side of the fixing steel bar (50); a fixing sleeve (622) fixedly arranged on the top of the movable seat (621); a threaded rod (623) threadedly connected to the top of the fixing sleeve (622); a third steel wire (624) arranged on the top of the threaded rod (623), and the threaded rod (623) is mounted with the roof construction steel bar layer (10) through the third steel wire (624).

3. A device for preventing the upward movement of a core in a hollow core panel as claimed in claim 2 wherein, The steel bar layer fixing assembly (62) further comprises: two limiting rods (625) penetratingly connected to the two sides of the movable seat (621), and one end of each of the two limiting rods (625) is in contact with the fixing steel bar (50); a fixing block (626) arranged on the outer end of the limiting rod (625); a spring (627) sleeved on the outer side of the limiting rod (625), and two ends of the spring (627) are fixedly connected with the movable seat (621) and the fixing block (626) respectively.

4. A hollow floor formwork, characterized by, The device is used for limiting the floating of a hollow slab inner mold, the hollow slab inner mold comprises an inner mold seat (20) between two roof construction steel bar layers (10), an outer side of the inner mold seat (20) is provided with a frame (30), a middle part of the inner mold seat (20) is provided with a connecting groove seat (40), a plurality of recesses (21) are formed in the middle part of the top of the inner mold seat (20), the plurality of recesses (21) are in communication with the slot of the connecting groove seat (40), and the fixing steel bar (50) is arranged in one of the recesses (21).

5. A form for use in a hollow floor construction as claimed in claim 4, wherein A plurality of holes (31) are formed in the frame (30), the fixing steel bar (50) is arranged on the top of two of the holes (31), the inner mold seat fixing assembly (61) comprises two first steel wires (611), and the two first steel wires (611) are arranged in the two holes (31) respectively.

6. A form for use in a hollow floor construction as claimed in claim 4, wherein A connecting rod is arranged in the slot of the connecting groove seat (40), a second steel wire (612) is sleeved on the outer side of the middle part of the fixing steel bar (50), and the bottom of the second steel wire (612) is sleeved on the connecting rod.