Hole opening mold free of steel bar planting

Abstract

The utility model belongs to the technical field of building construction dies, and particularly relates to a steel bar planting-free hole die, which is mounted at a prefabricated hole of a laminated slab floor, and comprises a steel cylinder assembly which is formed by welding four steel plates (steel cylinder side arms) into an inverted prismatic table, the top opening and the bottom opening of the steel cylinder assembly extend out of the prefabricated hole, and a steel bar planting-free hole is formed in the prefabricated hole of the laminated slab floor. A steel plate is welded to the side wall of the steel cylinder according to the size of the material conveying opening, wherein the height of the steel plate is equal to that of the upper cast-in-place concrete plate face of the composite plate, and the width meets the plate steel bar anchoring length. According to the hole mold free of steel bar planting, the problems that steel bars are cut off from a material conveying opening, the steel bars are anchored in a steel bar planting mode, the steel bars with the corresponding lengths and intervals are directly placed into a formed concrete platform in the later period, and direct pouring forming is conducted are effectively solved through the steel cylinder assembly, so that the construction efficiency is improved; the problem of later-stage water seepage of the secondary part is greatly solved.

Description

Technical Field

[0001] This utility model relates to the field of building construction mold technology, specifically a mold for openings that does not require rebar installation. Background Technology

[0002] During construction, it is often necessary to reserve various openings in concrete structures, such as those for installing pipes and ventilation equipment. Traditional methods for reserving openings typically involve rebar installation, where steel bars are inserted around the opening to enhance its structural strength. However, this traditional method has several problems: 1. Complex and time-consuming construction: Rebar installation requires drilling holes in the concrete structure, cleaning the holes, injecting adhesive, inserting the rebar, and securing it. This series of steps is cumbersome and time-consuming. Furthermore, drilling generates dust, polluting the construction site and affecting the health of workers. 2. Difficulty in ensuring quality: The quality of rebar installation depends on multiple factors, including the depth and diameter of the holes, the quality and amount of adhesive injected, and the depth of rebar insertion. Problems in any of these areas can lead to insufficient bond strength, affecting the structural strength of the opening edges and potentially causing cracking and deformation during subsequent use.

[0003] In the construction system of prefabricated composite slab aluminum alloy formwork, in order to improve construction efficiency and speed up construction progress, holes are often reserved in the corresponding functional rooms as material transfer ports, layout holes, pump pipe ports and other reserved holes between adjacent two layers to meet the actual needs of on-site use. The existing molds are generally steel boxes with trapezoidal cross sections. After the material is transferred, the steel bars must be anchored by planting rebars. Because the cast-in-place concrete on the upper part of the composite slab is relatively thin, small cracks often occur on the slab surface during the drilling process, making it impossible to complete the slab surface anchoring well, affecting the forming quality of the openings, and even causing water seepage on the slab surface. As a result, the construction efficiency of sealing the openings is poor. Utility Model Content

[0004] The purpose of this utility model is to provide a rebar-free opening mold to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rebar-free opening mold, comprising a steel cylinder assembly and a handle, wherein the handle is fixedly connected to the side of the steel cylinder assembly, a top sealing steel plate of a side arm steel plate is installed on the upper outer side of the steel cylinder assembly, a bottom sealing steel plate of a side arm steel plate is installed on the outer side of the steel cylinder assembly and below the top sealing steel plate of the side arm steel plate, and the steel cylinder assembly has openings inside.

[0006] Preferably, the steel cylinder assembly is a steel cylinder formed by welding four steel cylinder side arms into an inverted frustum.

[0007] Preferably, the steel cylinder assembly has several support rods fixedly welded inside, thereby effectively preventing deformation during construction.

[0008] Preferably, the steel cylinder side arm is welded to a steel plate of the same height as the upper cast-in-place slab of the composite slab, according to the size of the material transfer opening, and the width of the steel plate meets the anchorage length of the slab reinforcement.

[0009] Preferably, a cast-in-place slab is installed on the outer side of the steel cylinder assembly, and a composite slab is connected to the bottom of the cast-in-place slab.

[0010] Preferably, the steel cylinder side arm is located on the upper part of the composite plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This rebar-free opening mold effectively solves the problem of cutting off rebar at the material transfer opening. It uses rebar anchoring to secure the rebar, allowing for direct placement of rebar of appropriate length and spacing into the molded concrete platform for casting, thus improving construction efficiency.

[0013] 2. The mold for the opening without rebar installation has a wider platform, which greatly reduces the risk of water seepage in the secondary area later. Attached Figure Description

[0014] Figure 1 This is a top view of the overall device of this utility model;

[0015] Figure 2 This is a side plan view of the overall device of this utility model;

[0016] Figure 3 This is a front view plan of the overall device of this utility model;

[0017] Figure 4 This is a schematic diagram of the overall device installation structure of this utility model.

[0018] In the diagram: 1. Handle; 2. Steel cylinder side arm; 3. Top sealing steel plate of side arm steel plate; 4. Bottom sealing steel plate of side arm steel plate; 5. Cast-in-place slab; 6. Composite slab; 7. Hole; 8. Steel cylinder assembly. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4 This utility model provides a technical solution: a rebar-free opening mold, including a steel cylinder assembly 8 and a handle 1. The handle 1 is fixedly connected to the side of the steel cylinder assembly 8. A side arm steel plate top sealing steel plate 3 is installed on the upper outer side of the steel cylinder assembly 8. A side arm steel plate bottom sealing steel plate 4 is installed on the outer side of the steel cylinder assembly 8 and below the side arm steel plate top sealing steel plate 3. A hole 7 is opened inside the steel cylinder assembly 8.

[0021] The steel cylinder assembly 8 is formed by welding four steel cylinder side arms 2 into an inverted frustum-shaped steel cylinder. This allows the steel cylinder side arms 2 to form a steel plate structure, which, as a load-bearing structure of the building, can withstand enormous loads. For example, in high-rise buildings, steel beams and columns (made from steel plates) can effectively support the weight of the floors, ensuring the stability of the building during use.

[0022] The steel cylinder assembly 8 has several support rods welded inside, which effectively prevents deformation during construction.

[0023] The steel cylinder side arm 2 is welded to a steel plate of the same height as the cast-in-place slab 5 above the composite slab 6, according to the size of the material transfer port, and the width of the plate meets the anchorage length of the slab reinforcement.

[0024] A cast-in-place slab 5 is installed on the outside of the steel cylinder assembly 8, and a composite slab 6 is connected to the bottom of the cast-in-place slab 5.

[0025] The steel cylinder side arm 2 is located on the upper part of the composite plate 6.

[0026] Working principle: After the prefabricated composite slab 6 is hoisted and the upper steel reinforcement is tied, it is placed inside the material transfer port. After the pouring is completed, the material transfer port mold is removed. After the opening is completed, the misalignment between the composite slab 6 and the cast-in-place part is cleaned. Reinforcing bars of appropriate length and diameter are tied according to the spacing requirements in the drawings, and cement slurry is applied around the perimeter. High-grade micro-expansion concrete is then poured. A 1cm high curb is set around the perimeter to facilitate concrete curing and to conduct the corresponding water tightness test. The opening location is then determined according to the construction drawings. The outer frame is placed in the corresponding position on the building formwork, ensuring the outer frame is firmly installed. The shape and size of the opening are reserved as needed. A suitable steel cylinder assembly 8 is selected, and the outer frame of the steel cylinder assembly 8 is connected, ensuring the steel cylinder assembly 8 is in the correct position within the outer frame, thus determining the size of the reserved opening. After the steel cylinder assembly 8 is installed and checked for accuracy, concrete is poured. The concrete is slowly poured into the gap between the outer frame and the inner formwork. During the pouring process, care is taken to avoid the concrete impacting the inner formwork to prevent displacement. After the concrete has solidified and reached a certain strength, the steel cylinder assembly 8 is removed from the concrete opening, completing the opening reservation operation.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A rebar-free opening mold, comprising a steel cylinder assembly (8) and a handle (1), characterized in that: The handle (1) is fixedly connected to the side of the steel cylinder assembly (8). A top sealing steel plate (3) of the side arm steel plate is installed on the upper side of the steel cylinder assembly (8). A bottom sealing steel plate (4) of the side arm steel plate is installed on the outer side of the steel cylinder assembly (8) and below the top sealing steel plate (3). A hole (7) is opened inside the steel cylinder assembly (8).

2. The rebar-free opening mold according to claim 1, characterized in that: The steel cylinder assembly (8) is a steel cylinder formed by welding four steel cylinder side arms (2) into an inverted frustum.

3. The rebar-free opening mold according to claim 1, characterized in that: The steel cylinder assembly (8) has a support rod fixedly welded inside, and there are several support rods.

4. The rebar-free opening mold according to claim 2, characterized in that: The steel cylinder side arm (2) is welded with a steel plate of the same height as the cast-in-place slab (5) above the composite slab (6) according to the size of the material transfer port, and the width of the plate meets the anchorage length of the slab reinforcement.

5. The rebar-free opening mold according to claim 1, characterized in that: A cast-in-place slab (5) is installed on the outside of the steel cylinder assembly (8), and a composite slab (6) is connected to the bottom of the cast-in-place slab (5).

6. The rebar-free opening mold according to claim 2, characterized in that: The steel cylinder side arm (2) is located on the upper part of the composite plate (6).

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