A floor vertical hole sealing device

Abstract

The utility model discloses a floor vertical hole plugging device, including a plurality of reinforcing bars and bottom support plate, reinforcing bar includes reinforcing bar body and the reinforcing bar branch that sets up at reinforcing bar both ends to make reinforcing bar present " several " shape, a plurality of reinforcing bars are all inserted in the hole, and a plurality of reinforcing bars are spaced distribution along the same direction, and the opening of a plurality of reinforcing bars all faces towards the room, bottom support plate sets up at the one side of hole and faces towards outdoor, and bottom support plate is detachably connected with reinforcing bar body. By adopting the above setting, can realize exempting from supporting, can fast construction, utilizes reinforcing bar surplus material and can have structural reinforcement function.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction structures for sealing floor openings, and specifically relates to a floor vertical opening sealing device. Background Art

[0002] According to the conventional technology in the field of building construction, the main steps of the traditional reserved floor opening sealing process are as follows:

[0003] 1. Erection of formwork support frame: Erect a scaffold or support frame in the space below the reserved floor opening (such as a basement) to serve as the support structure for the bottom formwork;

[0004] 2. Installation of bottom formwork: Fix a wooden formwork or steel formwork on the support frame to form a closed support surface at the bottom of the opening;

[0005] 3. Steel bar binding: Bind reinforcing steel bars around the opening, which are usually only connected to the original structure at the edge of the opening;

[0006] 4. Concrete pouring: Pour concrete above the formwork, and remove the formwork and the support frame after the strength reaches the standard.

[0007] Typical application scenarios of this solution include the sealing of reserved openings in building construction, especially in scenarios such as basements and standard floor slabs. Although some improved formwork support tools (such as adjustable brackets, prefabricated member-assisted formwork support, etc.) exist in the prior art, their core principle still relies on the combination of "lower support + external formwork", and does not eliminate the necessity of erecting a support frame. When applied to low and narrow spaces in basements, dense pipeline areas or high-altitude scenarios, there are usually problems such as difficult positioning of the support frame and limited operating space, which lead to low construction feasibility and high safety risks. Contents of the Utility Model

[0008] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a floor vertical opening sealing device, which can realize support-free, rapid construction, and can use leftover steel bars to achieve the structural reinforcement function at the same time.

[0009] The purpose of the utility model is realized through the following technical solutions:

[0010] A floor vertical opening sealing device, comprising

[0011] a plurality of steel bars, each of which includes a steel bar body and steel bar support bars arranged at both ends of the steel bar, so that the steel bar is in a shape of a reversed Chinese character "ji", a plurality of the steel bars are all inserted into the opening, the plurality of the steel bars are spaced apart and distributed along the same direction, and the openings of the plurality of the steel bars all face the indoor side;

[0012] a bottom support plate, which is arranged on the side of the opening facing the outdoor, and is detachably connected to the rebar body.

[0013] Further, a limiting strip is disposed at the end of the rebar branch, and the limiting strip is perpendicular to the rebar branch.

[0014] Further, the diameters of the rebar body, the rebar branches, and the limiting strip are all 12mm to 16mm, the length of the rebar branch is 10cm to 15cm, and the spacing between two adjacent rebar branches is ≥15cm.

[0015] Further, the rebar branches are welded or integrally connected to the end of the rebar body, and the limiting strip is welded or integrally connected to the end of the rebar branch.

[0016] Further, a plurality of binding holes are formed at the edge of the bottom support plate, and the binding holes are detachably bound and connected with the rebar body through iron wires or binding ties.

[0017] Further, the outer shape of the bottom support plate is consistent with the shape of the opening, the outer diameter of the bottom support plate is 10cm to 20cm larger than the outer diameter of the opening, and the thickness of the bottom support plate is 3mm to 5mm.

[0018] Further, the bottom support plate adopts an acrylic support plate.

[0019] A construction method for a floor vertical opening sealing device:

[0020] (1) Preliminary preparation:

[0021] Rebar processing: Use on-site rebar remnants to cut and then weld or bend to form the "several"-shaped rebar strip structure of this utility model. During processing, the length of the horizontal section of the rebar strip structure is appropriately adjusted according to the floor thickness and the width and depth of the reserved groove (usually ≥15cm).

[0022] Groove construction: Use machinery or manual work to chisel grooves on the bottom surface around the floor opening. The depth of the groove is twice the diameter of the rebar strip, and the width of the groove matches the horizontal section of the rebar strip.

[0023] (2) Device installation:

[0024] Step 1: Insert the limiting parts of 2 to 4 "several"-shaped rebar strips into the grooves of the floor opening, ensure that the horizontal sections are completely attached to the bottom and side surfaces of the grooves until the limiting strips abut against the side surface of the floor, so as to achieve the limiting and positioning effects.

[0025] Step 2: Place the acrylic bottom support plate according to the shape of the opening, so that the edge of the bottom support plate covers the perimeter of the opening by 5cm-10cm. Tie the bottom support plate to the middle of the steel bar body with the binding wire to ensure that the bottom of the opening is tight and there is no leakage of grout.

[0026] Step 3: If necessary, additional reinforcing bars can be tied around the opening and in the vertical section of the reinforcing bars to form a complete reinforcing bar skeleton.

[0027] (3) Concrete pouring and curing:

[0028] Pour C25-C30 fine aggregate concrete (slump 180-220mm) into the opening, covering the vertical section of the reinforcing bar and the entire cross section of the opening. After compaction by vibration, cure.

[0029] A steel support frame formed by several steel bars is permanently embedded in the concrete during pouring. Its vertical section (steel bar) forms a bond with the surrounding concrete, and its horizontal section (limiting bar) and the floor slab groove jointly bear the shear force, enhancing the strength of the opening sealing area.

[0030] (4) Demolition and Relocation:

[0031] Once the concrete reaches 75% strength (approximately 3-5 days), cut the binding wire, remove the acrylic bottom support plate, and the construction is complete.

[0032] The bottom support plate can be cleaned and reused, and the support frame made from the leftover steel bars does not need to be recycled and can be directly retained as part of the structural reinforcement.

[0033] This utility model has the following beneficial effects:

[0034] 1. Solving the problem of difficult support frame erection in confined spaces: Traditional methods require scaffolding or support frames to be erected below the opening, especially in low-ceilinged basements, areas with dense pipelines, or high-altitude scenarios. Positioning the support frame is difficult, and operating space is limited, leading to low construction feasibility and high safety risks. By using "U"-shaped steel bars in conjunction with the floor slab opening, no support structure needs to be built below the opening. The floor slab itself is used to fix the support system, achieving support frame-free construction, suitable for complex environments such as narrow spaces and high altitudes.

[0035] 2. Improve construction speed and shorten construction cycle: Technical issues: In traditional solutions, the erection and dismantling of support frames account for 40%-50% of the process time, and each opening requires independent operation, resulting in extremely low efficiency when sealing large-scale openings (such as 1000 reserved openings). By quickly assembling standardized "U"-shaped steel bars and bottom support plates (requiring only binding and fixing), the support frame erection / dismantling process is eliminated, reducing the construction time of a single opening by more than 50%, achieving efficient and rapid sealing, and is especially suitable for batch construction.

[0036] 3. Reduce manpower and material consumption, and lower construction costs: Traditional processes rely on a large amount of reusable materials such as steel pipes, fasteners, and formwork, and require the cooperation of professional scaffolders and carpenters, resulting in high manpower and material costs and low material reuse rates. Utilizing leftover steel bars on the construction site to process "U"-shaped steel bars eliminates the need for additional purchases of standardized materials, while simultaneously reducing the input of reusable materials (e.g., reducing steel pipe and formwork usage by 70%), achieving material reuse and cost optimization, and aligning with the concept of green construction.

[0037] 4. Enhance the structural strength and durability of the opening sealing area: Existing solutions only connect the reinforcing bars to the edge of the opening, failing to form an integral load-bearing structure within the hole. This makes the concrete prone to cracking due to stress concentration, and there is a lack of continuous support after the support frame is removed. By directly embedding "U"-shaped reinforcing bars into the sealing concrete, an internal reinforcement skeleton is formed, allowing the reinforcing bars and concrete to work together to reinforce the opening area, improving crack resistance and structural reliability, and avoiding the risk of future cracking.

[0038] 5. Achieving reusability and versatility of the device: Traditional formwork and support frames are for single use or low turnover, and require customized processing for different opening shapes, resulting in poor applicability. Through adjustable "U"-shaped steel bars (suitable for round / square openings with diameter / side length ≤ 50cm) and detachable acrylic support plates (customized according to opening shape), the device achieves rapid turnover and universal adaptability, reducing material waste and improving construction flexibility. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the present invention (the bottom support plate is square).

[0040] Figure 2 This is a schematic diagram of the overall structure of this utility model (the bottom support plate is circular).

[0041] Figure 3 This is a schematic diagram of the square opening of this utility model.

[0042] Figure 4 This is a schematic diagram of the circular opening of this utility model.

[0043] Figure 5 This is a construction diagram of the overall structure of Example 2.

[0044] Figure 6 This is a schematic diagram of the concrete pouring and drying state after the opening is sealed in Example 2.

[0045] In the diagram: 1. Rebar strip; 11. Rebar body; 12. Rebar support strip; 13. Limiting strip; 2. Bottom support plate; 3. Opening; 31. Groove. Detailed Implementation

[0046] The present utility model will be described in further detail below with reference to the accompanying drawings and specific embodiments. The terms such as "upper", "inner", "middle", "left", "right" and "one" cited in this specification are only for the convenience of clear description, and are not intended to limit the scope in which the present utility model can be implemented. Any change or adjustment of their relative relationships, without substantially altering the technical content, shall also be deemed to fall within the implementable scope of the present utility model.

[0047] The present utility model addresses the issue that the conventional sealing process for reserved openings in floors in the prior art relies on the combination of "lower support + external formwork", which cannot avoid the necessity of erecting support frames. When applied to low spaces in basements, areas with dense pipelines or high-altitude scenarios, there are usually problems such as difficult positioning of the support frames and limited operating space, leading to low construction feasibility and high safety risks. Therefore, a floor vertical opening sealing device is developed, which can realize support-free and rapid construction, and can achieve the structural reinforcement function by using residual steel bar materials.

[0048] The structure and principle of the floor vertical opening sealing device are described in detail as follows:

[0049] A floor vertical opening sealing device, as shown in Figure 1 to Figure 6 the figure, includes a plurality of steel bar strips 1 and a bottom support plate 2. The plurality of steel bar strips 1 are usually formed by secondary processing of excess residual steel bar materials at the construction site, and are overall in a "pi" shape, configured to be arranged in the opening 3. The two side edges of the steel bar strip 1 can fit well with the pre-arranged grooves 31 of the opening 3, so as to achieve firm and stable installation. The bottom support plate 2 is arranged on the outdoor side of the opening 3, for sealing the opening 3, and the bottom support plate 2 can be detachably matched with the steel bar strips 1 to realize temporary fixation. Thereby, the sealing of the opening 3 is achieved, which further facilitates pouring the opening 3 with concrete. After the concrete strength reaches 75%, the bottom support plate 2 can be disassembled for recycling. Compared with the prior art, the floor vertical opening 3 sealing device of the present utility model eliminates the lower support structure, simplifies the overall structure, enables rapid and efficient construction, and uses raw materials from on-site residual materials, which can effectively reduce costs.

[0050] Regarding the structure of the steel bar strip 1: the steel bar strip 1 includes a steel bar body 11, steel bar support strips 12 arranged at both ends of the steel bar strip 1, and limit strips 13 arranged at the ends of the steel bar support strips 12. The steel bar support strips 12 are substantially perpendicular to the steel bar body 11, and the limit strips 13 are substantially perpendicular to the steel bar support strips 12, so that the overall structure of the steel bar strip 1 is in a "pi" shape.

[0051] During material selection and processing, the reinforcing bar support 12 is welded or integrally bent to form the end of the reinforcing bar body 11, and the limiting strip 13 is joined or integrally bent to form the end of the reinforcing bar support 12. The reinforcing bar body 11, reinforcing bar support 12, and limiting strip 13 can all be made from leftover reinforcing bars with a diameter of 12mm to 16mm. The length of the reinforcing bar support 12 is 10cm to 15cm, and the spacing between two reinforcing bar supports 12 is ≥15cm. The specific specifications can be designed according to the actual floor slab thickness and the shape and size of the opening 3.

[0052] In fixing the reinforcing bars 1 to the floor slab: several reinforcing bars 1 are inserted into the opening 3, spaced apart in the same direction, with their openings all facing inwards. Specifically, the horizontal section (limiting strip 13) of the reinforcing bar 1 is completely embedded in the groove 31 on the inner wall of the opening 3, with the length of the groove 31 being greater than or equal to the length of the horizontal section, ensuring no slippage of the reinforcing bar in the horizontal direction and a firm fit. The vertical section (the reinforcing bar support 12 and the reinforcing bar body 11 as a whole) extends vertically upwards until the reinforcing bar body 11 reaches the bottom of the reserved opening 3. Generally, a single opening 3 requires 2-4 reinforcing bars 1 (adjusted according to the size of the opening 3; square openings typically have one at each of the four corners, while circular openings typically have 2-3 evenly distributed), with the horizontal sections symmetrically distributed.

[0053] Regarding the structure of the bottom support plate 2: The bottom support plate 2 is made of acrylic and has a thickness of 3mm to 5mm. The bottom support plate 2 is located on the side of the opening 3 facing the outside. The shape of the bottom support plate 2 is consistent with the shape of the opening 3. The outer diameter of the bottom support plate 2 is 10cm to 20cm larger than the outer diameter of the opening 3. Therefore, the edge of the bottom support plate 2 extends 5cm to 10cm beyond the edge of the opening 3 to effectively seal the bottom of the opening 3. Several binding holes are provided on the edge of the bottom support plate 2. The diameter of the binding holes is 1mm to 2mm. The binding holes are detachably bound to the reinforcing bar body 11 by wire or cable ties.

[0054] It can be seen that the steel support frame formed by several steel bars 1 serves as a dual carrier of "support and reinforcement". The limiting strip 13 is flush with the bottom surface of the floor slab to achieve stable positioning. The limiting strip 13 in the horizontal section is fixed by the friction of the groove 31, while the steel bar body 11 supports the plate and is combined with the sealing concrete. The bottom supporting plate 2 only bears the short-term load during concrete pouring (about 24-48 hours) and does not need to bear the long-term load. After removal, the steel bars are completely embedded in the concrete to form a reinforcement layer. Therefore, it can be disassembled and reused when the concrete strength reaches 75%. Compared with the prior art, the floor slab vertical opening 3 sealing device of this utility model reduces the structure of the lower support, simplifies the overall structure, and allows for rapid and efficient construction. Moreover, the raw materials are derived from on-site surplus materials, which can effectively reduce costs.

[0055] Based on the above detailed introduction to the structure and working principle of the floor vertical opening 3 sealing device of the present utility model, further descriptions are provided below through a plurality of practical embodiments:

[0056] Embodiment 1: As shown in Figure 1 and Figure 3 , the sealing of a square reserved opening 3 (side length 50cm)

[0057] Application scenario: A square failed reserved opening with a diameter of 50cm on the top slab of the basement, the floor thickness is 20cm, and the depth of the groove 31 is 25mm (adapted to Φ12 steel bar).

[0058] (1) Preparatory work

[0059] 1. Materials and tools

[0060] Steel bar support frame: Using surplus Φ12 steel bar material, it is processed into a "several"-shaped steel bar strip 1, the height of the vertical section (steel bar support strip 12) is 18cm (floor thickness 20cm - groove 31 depth 2cm), the length of the horizontal section (steel bar body 11) is 20cm, both ends are bent 90°, and 4 pieces are configured for a single opening 3 (1 at each of the four corners of the opening 3).

[0061] Acrylic support plate: Customized 55cm × 55cm square plate with a thickness of 5mm, 8 Φ3mm binding holes are evenly opened on the edge (spacing 15cm).

[0062] Auxiliary materials: Binding iron wire (diameter 1.5mm), C30 fine aggregate concrete (slump 200mm), electric drill (for excavating the groove 31).

[0063] 2. Construction of floor groove 31

[0064] On the bottom surface of the floor at the four corners of the opening 3, an electric drill combined with a milling cutter is used to excavate a rectangular groove 31, with dimensions: length 20cm × width 15mm × depth 25mm (matching the horizontal section of the steel bar), and the center of the groove 31 is 10cm away from the edge of the opening 3.

[0065] (2) Device installation

[0066] Fixing of steel bar strips 1: The horizontal sections of the 4 "several"-shaped steel bar strips 1 are respectively embedded into the grooves 31 at the four corners, ensuring that the horizontal sections are completely attached to the bottom and side surfaces of the grooves 31, and adjusted by gentle tapping with a hammer until there is no looseness (the embedding depth of the horizontal section is ≥18cm, with an exposed length of 2cm).

[0067] Installation of support plate: The acrylic bottom support plate 2 covers the bottom of the opening 3, the edge of the plate extends 5cm beyond the opening 3, the binding iron wire is passed through the binding holes on the edge of the plate, and bound and fixed to the middle part of the vertical section of the steel bar (10cm away from the horizontal section), 2 turns of binding at each position, with a wire spacing of 15cm.

[0068] Check whether the support plate is flat, with its edge fitting closely to the bottom surface of the floor slab, and fill the gaps with sealant to prevent slurry leakage.

[0069] Steel bar binding (optional): On the original floor slab steel bars around the opening 3, add additional Φ10@150mm distribution bars, which are welded or bound and connected to the vertical sections of the several-shaped steel bars to form an integral reinforcement mesh.

[0070] (3) Concrete pouring and curing

[0071] Pouring construction: Pour C30 fine aggregate concrete, slowly pour it in from one side of the opening 3 until the concrete surface is flush with the top surface of the floor slab, vibrate and compact it with a vibrator (avoid touching the support plate), and ensure that the vertical sections of the steel bars are completely embedded in the concrete.

[0072] Curing management: Cover with a film for curing, keep it moist for 3 days, and no load shall be applied around the opening 3 during this period.

[0073] (4) Removal and turnover

[0074] When the concrete strength reaches 75% (about 3 days, tested through test blocks), cut the binding wires with scissors, remove the bottom support plate 2, and it can be reused after cleaning (single loss rate ≤ 5%). The steel bar support frame is permanently retained in the concrete, the horizontal section forms a mechanical anchorage with the groove 31, and the vertical section is wrapped by the concrete to form a reinforcement layer.

[0075] Embodiment 2: As shown Figure 2 , Figure 4 to Figure 6 in the figure, the plugging of a circular reserved opening 3 (diameter 40cm)

[0076] Application scenario: A circular pipe-passing reserved opening with a diameter of 40cm on the standard floor slab, the floor slab thickness is 15cm, and the depth of the groove 31 is 20mm (adapted to Φ10 steel bars).

[0077] (1) Preparatory work

[0078] 1. Material adjustment

[0079] Steel bar support frame: Processed from Φ10 steel bars, the height of the vertical section is 13cm, the length of the horizontal section is 15cm, and 3 pieces are evenly distributed for each single opening 3 (at intervals of 120°).

[0080] Acrylic support plate: A custom-made circular plate with a diameter of 50cm, and 6 Φ2mm binding holes are opened on the edge (with a spacing of 20cm).

[0081] Construction of groove 31: 3 grooves 31 are evenly distributed on the circumference of the opening 3, each groove 31 is 15cm long × 20mm deep, with a central angle of 120°, and 8cm away from the edge of the opening 3.

[0082] (2) Device installation

[0083] The horizontal section of the steel bar is embedded in the recess 31, the support plate is bound to the vertical section of the steel bar through 3 groups of iron wires, and the remaining steps are the same as those in Embodiment 1.

[0084] (3) Key Parameter Differences

[0085] The concrete slump is 180mm, and the material is fed symmetrically from the center during pouring to avoid offset of the support plate; the support plate can be removed after a curing time of 48 hours (due to the smaller diameter, the load is lower).

[0086] III. Embodiment 3: Expansion of Large-Sized Opening 3 (side length 60cm, modified embodiment)

[0087] Description: When the side length of the opening 3 exceeds 50cm (such as 60cm), the stability is improved by increasing the number of steel bars.

[0088] (1) Adjustment Scheme

[0089] Configuration of steel bars 1: 6 "几"-shaped steel bars (Φ14), with a horizontal section length of 25cm, one at each of the midpoints of the four sides and four corners of the opening 3, forming a symmetric support.

[0090] Bottom support plate 2: 65cm×65cm steel plate (thickness 3mm, replacing the acrylic plate to adapt to larger loads), with 12 binding holes opened at the edge.

[0091] (2) Construction Differences

[0092] The depth of the recess 31 is 30mm (2 times the diameter of the Φ14 steel bar), and the grooving accuracy is required to be ±2mm. The diameter of the binding iron wire is 2mm, and the spacing is 10cm, to ensure that the deflection of the support plate is ≤5mm.

[0093] IV. General Construction Steps and Parameter Ranges

[0094] Process Specific operation Parameter / Condition Steel bar processing Cut the steel bar → bend / weld it into a "几" shape, the length of the horizontal section is ≥ 1.5 times the floor slab thickness, and the height of the vertical section = floor slab thickness - groove depth. Steel bar diameter: Φ10-Φ16 (selected according to the opening size, Φ10-Φ12 is used for openings ≤50cm, and Φ14-Φ16 is used for openings of 50-80cm). Groove construction Mechanically chisel or manually chisel the groove, which is located on the bottom surface of the floor slab around the opening, avoiding the original structural steel bars. Depth = 2 times the steel bar diameter (tolerance ±2mm), width = diameter of the horizontal section of the steel bar + 2mm, length = length of the horizontal section - 2cm. Device assembly Embed the horizontal section of the steel bar into the groove → place the support plate → bind and fix with iron wire. Iron wire spacing: 10-15cm, the edge of the support plate extends 5-10cm beyond the opening, and the binding force ≥ 50N per position. Concrete pouring Pour fine aggregate concrete in layers and vibrate to compactness. Strength grade: C25-C30, slump: 180-220mm, pouring temperature: 5-30℃ Removal condition Concrete strength ≥ 75% of the design value (determined by test blocks cured under the same conditions). Removal time: 3-5 days at normal temperature (adjust according to strength gain).

[0095] V. Material Replacement and Modified Implementation

[0096] 1. Replacement of Support Plate

[0097] Thin steel plate (thickness 2-3mm): suitable for openings 3 with large loads (such as side length 50-80cm), with high strength but increased weight, requiring the addition of 1-2 steel bar support brackets;

[0098] Plastic plate (thickness 5-8mm): lower cost, light and easy to remove, suitable for openings 3 in dry environments.

[0099] 2. Replacement of Steel Bar

[0100] Waste steel strand: cut and bent into a "几" shape, and the horizontal section needs to be welded to strengthen the anchorage;

[0101] Angle steel (L50×5): cut into a "几" shape, with the horizontal section and vertical section welded, suitable for scenarios with no surplus reinforcing bars.

[0102] 3. Special scenario adaptation

[0103] High-altitude opening 3 (such as the opening 3 of a cantilevered floor slab): add 1 spare reinforcing bar support bracket (5 in total), and increase the length of the horizontal section to 25cm to ensure resistance to wind loads and construction loads;

[0104] Humid environment: apply waterproof coating on the edge of the support plate, and perform anti-rust treatment on the surface of the reinforcing bars (such as epoxy coating).

[0105] VI. Implementation effect verification

[0106] (1) Efficiency comparison: The construction time for a single opening 3 using the traditional process is 2.5 hours (including support frame erection), while this solution takes 0.5 hours, with an 80% efficiency improvement. For the construction period of 1000 openings 3: the traditional process takes 35 days vs. 12 days for this solution (calculated based on 80 openings 3 per day).

[0107] (2) Cost comparison (for a single 50cm×50cm opening 3):

[0108] Item Traditional scheme This scheme Saving ratio Material cost 85 yuan 32 yuan 62% Labor cost 60 yuan 25 yuan 58% Turnover material loss 20 yuan 5 yuan 75%

[0109] (3) Structural performance

[0110] Crack resistance test: when loaded to 1.5 times the design load, a 0.3mm crack appears at the edge of the opening in the traditional solution, while no visible crack is observed in this solution;

[0111] Reinforcing bar pull-out test: the anti-slip force of the horizontal section is ≥5kN (no built-in reinforcement in the traditional solution).

[0112] The embodiments of this utility model are not limited thereto. Based on the above content of this utility model, using the common technical knowledge and conventional means in the art, without departing from the above basic technical idea of this utility model, this utility model can also make various other forms of modifications, substitutions or combinations, all of which fall within the protection scope of the claims of this utility model.

Claims

1. A device for sealing vertical openings in floor slabs, characterized in that, comprising: a plurality of steel bars, each of said steel bars comprising a steel bar body and steel bar branches arranged at two ends of said steel bar, so that said steel bar is in a "several" shape; a plurality of said steel bars are all inserted into the opening, a plurality of said steel bars are distributed at intervals along the same direction, and the openings of a plurality of said steel bars all face the interior of the room; a bottom support plate, said bottom support plate being arranged on the side of the opening facing the exterior of the room, said bottom support plate being detachably connected to said steel bar body.

2. The floor slab vertical opening sealing device as described in claim 1, characterized in that, A limiting strip is arranged at the end of said steel bar branch, and said limiting strip is perpendicular to said steel bar branch.

3. The floor slab vertical opening sealing device as described in claim 2, characterized in that, The diameters of said steel bar body, said steel bar branches and said limiting strip are all 12mm to 16mm, the length of said steel bar branch is 10cm to 15cm, and the spacing between two said steel bar branches is ≥15cm.

4. The floor slab vertical opening sealing device as described in claim 2, characterized in that, Said steel bar branches are welded or integrally connected to the ends of said steel bar body, and said limiting strip is welded or integrally connected to the end of said steel bar branch.

5. The floor slab vertical opening sealing device as described in claim 1, characterized in that, A plurality of binding holes are opened at the edge of said bottom support plate, and said binding holes are detachably bound and connected to said steel bar body through iron wires or binding straps.

6. The floor slab vertical opening sealing device as described in claim 1, characterized in that, The outer shape of said bottom support plate is consistent with the shape of the opening, the outer diameter of said bottom support plate is 10cm to 20cm larger than the outer diameter of the opening, and the thickness of said bottom support plate is 3mm to 5mm.

7. The floor slab vertical opening sealing device as described in claim 1, characterized in that, Said bottom support plate adopts an acrylic support plate.

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