A core mold anti-buoyancy device for hollow floor slab construction

Abstract

This utility model discloses a core mold anti-buoyancy device for hollow floor slab construction, including a threaded rod with support nuts threaded at both ends. Threaded cylinders are threaded at both ends of the threaded rod, and a positioning plate is fixedly connected to one end of each threaded cylinder. The positioning plate is tightly connected to one side surface of the support nuts. A mounting groove is provided on one side surface of the positioning plate, and a hinge shaft is hinged to one side of the mounting groove. A limit rod is hinged to one side of the hinge shaft, and a snap-fit ​​groove is provided on one side surface of the limit rod. An elastic head is fixedly connected to one end surface of the limit rod, and the elastic head is tightly connected to one side of the outer surface of the threaded cylinder. An elastic positioning ring is sleeved on one end surface of the limit rod, and a pull ring is fixedly connected to one side of the elastic positioning ring. A pull rope is fixedly connected to one side of the pull ring, allowing for tightening and fixing for combined installation. This device is highly adaptable, avoids interference, and facilitates combined use.

Description

Technical Field

[0001] This utility model relates to the field of building construction, and more specifically, to a core mold anti-buoyancy device for hollow floor slab construction. Background Technology

[0002] Hollow core slabs are a type of cast-in-place reinforced concrete hollow core slab; also called cast-in-place flat slabs without beams, they are hollow core slabs without exposed beams cast in place after the core mold is installed; hollow core slabs include steel reinforcement, concrete, and core molds, with the core molds embedded in the reinforced concrete; during construction, the core molds often float up, which affects the spacing between the lower and upper structural steel reinforcements, resulting in uneven thickness of the upper and lower protective layers of concrete and an increase in the slab elevation, thus affecting the quality of the top slab pouring.

[0003] Application CN 119102333 A discloses a core mold anti-buoyancy tooling for hollow floor slab construction and its usage method. It includes a central support rod with a limiting sleeve at each end, and a threaded connecting rod connected to the internal thread of each sleeve. It also includes a rebar limiting clip, with a through hole corresponding to the threaded connecting rod and a limiting groove corresponding to the structural rebar. The rebar limiting clip is connected to the threaded connecting rod via a nut, with the side of the rebar limiting clip with the limiting groove located near the limiting sleeve. This invention controls the spacing between the upper and lower structural rebars through the central support rod, limiting sleeves, and rebar limiting clips, preventing the core mold from floating and causing uneven protective layer thickness, avoiding quality accidents, and improving construction efficiency and quality. The tooling has a simple structure and is easy to operate, making it worthy of widespread use in hollow floor slab construction.

[0004] In the above-disclosed structure, the threaded rod and the limiting cone are connected by a central support rod, which is then snapped onto the rebar cage to position the core mold. However, it lacks a separate positioning plate to hinge the limiting rod, making it impossible to fold and retract for positioning. This makes it difficult to insert into the gap of the rebar cage, which can easily cause interference. It also cannot be unfolded and snapped into the inside of the rebar cage, which makes it difficult to lock and fix the core mold after installation. Its adaptability is poor and needs to be improved. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a core mold anti-buoyancy device for hollow floor slab construction. By installing support nuts and positioning plates at both ends of the threaded rod, it can be installed and positioned separately, which is conducive to combined use. Furthermore, by installing a limit rod with a hinged mounting groove, it can be retracted for positioning and then inserted for installation, and then unfolded for locking and positioning. It can be tightened and fixed for combined installation, which has high adaptability, avoids interference, and is conducive to combined use.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A core mold anti-buoyancy device for hollow floor slab construction includes a threaded rod, with support nuts threaded onto both ends of the threaded rod, and threaded cylinders threaded onto both ends of the threaded rod. A positioning plate is fixedly connected to one end of the threaded cylinder, and the positioning plate is tightly connected to one side surface of the support nuts. A mounting groove is provided on one side surface of the positioning plate, and a hinge shaft is hinged to one side of the mounting groove. A limit rod is hinged to one side of the hinge shaft, and a locking groove is provided on one side surface of the limit rod. An elastic head is fixedly connected to one end surface of the limit rod, and the elastic head is tightly connected to one side of the outer surface of the threaded cylinder. An elastic positioning ring is sleeved on one end surface of the limit rod, and a pull ring is fixedly connected to one side of the elastic positioning ring, with a pull rope fixedly connected to one side of the pull ring.

[0008] Furthermore, there are four mounting grooves and four limiting rods, which are distributed at equal angles on one side surface of the positioning plate.

[0009] Furthermore, the snap-fit ​​grooves are evenly distributed on one side surface of the limiting rod, and are located on one side of the threaded rod.

[0010] Furthermore, the support nut is located at one end of the outer side of the positioning plate and at the end of the threaded rod. It is evenly distributed on the limiting rod at equal angles. During installation, it can be retracted for positioning. After insertion and alignment, it can be unfolded and snapped into the inside of the reinforcing cage, which is conducive to combination positioning, convenient for installation and use, and highly adaptable.

[0011] Furthermore, both ends of the threaded rod are provided with connecting through holes, which are located on the outside of the support nut.

[0012] Furthermore, a winding strip is fixedly connected inside the connecting through hole, and the winding strip is located at the upper end of the threaded rod.

[0013] Furthermore, the winding strips are symmetrically connected to both sides of the threaded rod and interconnected at the ends of the threaded rod. The winding strips are installed through connecting through holes in the threaded rod, which allows the ends of the threaded rods to be intertwined and positioned, improving the overall stability of the connection and facilitating combined use.

[0014] Compared with existing technologies, the advantages of this utility model are:

[0015] (1) This solution can be installed separately by installing support nuts and positioning plates at both ends of the threaded rod, which is conducive to combined use. Furthermore, the limit rod can be installed by hinged installation of the mounting groove. It can be retracted for positioning and then inserted for installation. After unfolding, it can be snapped for positioning and can be tightened for combined installation. It has high adaptability, avoids interference, and is conducive to combined use.

[0016] (2) By being evenly distributed at equal angles on the limiting rod, it can be retracted for positioning during installation, and can be unfolded and snapped into the inside of the steel cage after insertion and alignment, which is conducive to combination positioning, convenient for installation and use, and highly adaptable.

[0017] (3) By setting a connecting through hole through the threaded rod, the winding strip can be installed. The ends of the threaded rod can be wrapped and positioned to improve the stability of the overall connection and facilitate combination use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the planar structure of the present invention;

[0020] Figure 3 This is a partial cross-sectional view of the limiting rod connection of this utility model;

[0021] Figure 4 This is a partial structural diagram of the positioning disc connection of this utility model;

[0022] Figure 5 For the present utility model Figure 1 Enlarged view of point A in the connection of the flexible positioning ring.

[0023] Explanation of the labels in the diagram:

[0024] 1. Threaded rod, 11. Support nut, 12. Threaded cylinder, 13. Positioning plate, 14. Mounting groove, 15. Hinge shaft, 16. Limiting rod, 17. Snap-fit ​​groove, 18. Elastic head, 2. Elastic positioning ring, 21. Pull ring, 22. Pull rope, 23. Connecting through hole, 24. Winding strip. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 , Figure 4 and Figure 5A core mold anti-buoyancy device for hollow floor slab construction includes a threaded rod 1, with support nuts 11 threaded at both ends of the threaded rod 1. Threaded cylinders 12 are threaded at both ends of the threaded rod 1, and a positioning plate 13 is fixedly connected to one end of each threaded cylinder 12. This allows for threaded installation and fixation, enabling connection to two layers of reinforcing cages at both ends, facilitating separate installation and combination. The positioning plate 13 is tightly connected to one side of the support nuts 11. One side of the positioning plate 13 has an installation groove 14, with a hinge shaft 15 hinged to one side of the groove. A limit rod 16 is hinged to one side of the hinge shaft 15. The hinged installation allows for retraction and positioning, while the positioning connection allows for hinged rotation angles, facilitating expansion and positioning with high adaptability. One side of the limit rod 16 has a locking groove 17, and an elastic head 18 is fixedly connected to one end of the limit rod 16. The head 18 is tightly connected to one side of the outer surface of the threaded cylinder 12. One end of the limiting rod 16 is fitted with an elastic positioning ring 2. A pull ring 21 is fixedly connected to one side of the elastic positioning ring 2, and a pull rope 22 is fixedly connected to one side of the pull ring 21. During installation, the support nut 11 and the threaded cylinder 12 can be threaded onto both ends of the threaded rod 1, and the threaded rod can be inserted into the core mold for positioning. Then, the positioning plate 13 and the limiting rod 16 are inserted into the rebar cage. Then, the pull rope 22 is pulled, which, combined with the pull ring 21, pulls the elastic positioning ring 2, which can separate from the limiting rod 16. After the elastic head 18 is tightened against the threaded cylinder 12, the limiting rod 16 can be released, allowing it to unfold in all directions. The snap-fit ​​groove 17 can be snapped onto the surface of the rebar inside the rebar cage. In this way, the threaded connection at both ends can be locked and fixed, which is convenient for positioning the core mold, prevents it from floating, has high adaptability, and is easy to use.

[0027] Please refer to the following: Figure 2 and Figure 3 There are four mounting grooves 14 and four limiting rods 16, which are evenly distributed on one side surface of the positioning plate 13. The snap-fit ​​grooves 17 are evenly distributed on one side surface of the limiting rods 16 and are located on one side of the threaded rod 1. The support nut 11 is located at one end of the outer side of the positioning plate 13 and at the end of the threaded rod 1. By being evenly distributed on the limiting rod at equal angles, it can be retracted for positioning during installation. After insertion and alignment, it can be unfolded and snapped into the inside of the reinforcing cage, which is conducive to combination positioning, convenient for installation and use, and highly adaptable.

[0028] Please see Figure 1 and Figure 2Both ends of the threaded rod 1 are provided with connecting through holes 23, which are located outside the support nut 11. A winding strip 24 is fixedly connected inside the connecting through holes 23. The winding strip 24 is located at the upper end of the threaded rod 1 and is symmetrically connected to both sides of the threaded rod 1 and connected to the ends of the threaded rod 1. By setting the connecting through holes in the threaded rod, the winding strip can be installed, and the ends of the threaded rod can be wound and positioned together, which can improve the stability of the overall connection and facilitate combination and use. After the core mold is fixed in place by the threaded rod, it can be installed between two layers of steel cage. Then, the winding strip 24 is wound into the connecting through holes 23, which can connect the separately positioned threaded rods 1 together, thereby winding and reinforcing them to form an integrated structure for reinforcement, improving safety and stability, facilitating combination and use, and having high adaptability.

[0029] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A core mold anti-buoyancy device for hollow floor slab construction, comprising a threaded rod (1), wherein both ends of the threaded rod (1) are threadedly fitted with support nuts (11), and both ends of the threaded rod (1) are threadedly fitted with threaded cylinders (12), characterized in that: One end of the threaded cylinder (12) is fixedly connected to a positioning disc (13). The positioning disc (13) is tightly connected to one side surface of the support nut (11). One side surface of the positioning disc (13) is provided with an installation groove (14). A hinge shaft (15) is hinged to one side of the installation groove (14). A limit rod (16) is hinged to one side of the hinge shaft (15). A snap-fit ​​groove (17) is provided on one side surface of the limit rod (16). An elastic head (18) is fixedly connected to one end surface of the limit rod (16). The elastic head (18) is tightly connected to one side of the outer surface of the threaded cylinder (12). An elastic positioning ring (2) is sleeved on one end surface of the limit rod (16). A pull ring (21) is fixedly connected to one side of the elastic positioning ring (2). A pull rope (22) is fixedly connected to one side of the pull ring (21).

2. The anti-buoyancy device for core mold used in hollow floor slab construction according to claim 1, characterized in that: There are four mounting grooves (14) and four limiting rods (16), which are distributed at equal angles on one side surface of the positioning plate (13).

3. The anti-buoyancy device for core mold used in hollow floor slab construction according to claim 1, characterized in that: The snap-fit ​​grooves (17) are evenly distributed on one side surface of the limiting rod (16) and are located on one side of the threaded rod (1).

4. The anti-buoyancy device for core mold in hollow floor slab construction according to claim 1, characterized in that: The support nut (11) is located at one end of the outer side of the positioning plate (13) and at the end of the threaded rod (1).

5. The anti-buoyancy device for core mold in hollow floor slab construction according to claim 1, characterized in that: Both ends of the threaded rod (1) are provided with connecting through holes (23), which are located on the outside of the support nut (11).

6. The anti-buoyancy device for core mold in hollow floor slab construction according to claim 5, characterized in that: A winding strip (24) is fixedly connected inside the connecting through hole (23), and the winding strip (24) is located at the upper end of the threaded rod (1).

7. The anti-buoyancy device for core mold in hollow floor slab construction according to claim 6, characterized in that: The winding strip (24) is symmetrically connected to both sides of the threaded rod (1) and is connected to the end of the threaded rod (1).

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