Recyclable flue unloading steel bar pre-embedding fixing device

Abstract

The utility model discloses a turnover flue unloading reinforcing steel bar pre-embedded fixing device, the fixing device, a floor slab and an unloading reinforcing steel bar are poured together to achieve flue opening shaping and unloading reinforcing steel bar fixing, the fixing device comprises a flue opening shaping template, a reinforcing rib plate and a square steel inner support, the flue opening shaping template comprises a side die and a bottom die, the lower edge of the side die is connected with the outer edge of the bottom die, and the lower edge of the side die is connected with the outer edge of the bottom die. Reinforcing rib plates are arranged between the side dies and the connecting bottom die, square steel inner supports are horizontally fixed between the two opposite side dies, the number of the square steel inner supports is two, through holes used for being connected with floor formworks are formed in the bottom die, and clamping grooves used for fixing flue unloading steel bars are formed in the upper edges of the side dies. As a template for pouring the flue opening, the unloading reinforcing steel bar can be fixed, the unloading reinforcing steel bar can be pre-embedded in the flue opening of a floor slab in advance, the problem that construction is tedious when the unloading reinforcing steel bar is implanted after a main body structure is poured is solved, the unloading reinforcing steel bar can be accurately clamped at the nearest stress position through the clamping groove, and the unloading reinforcing steel bar is not prone to falling off. And the steel bar planting quality is ensured.

Description

Technical Field

[0001] This utility model relates to the field of flue installation technology, and in particular to a reusable flue unloading steel bar pre-embedded fixing device. Technical Background

[0002] Currently, prefabricated flues are commonly used in residential flue construction. However, prefabricated flues are generally quite heavy, which can easily cause settlement during installation. This can lead to varying degrees of deformation, cracks, or even detachment of the wall decoration layers on the flue, such as plaster or tile layers. Therefore, it is necessary to unload the prefabricated flues.

[0003] Traditional flue unloading techniques typically involve pre-reserving flue openings during floor slab pouring, and then placing unloading reinforcing bars at these openings during flue installation. This involves placing two φ12 or larger reinforcing bars at the pre-reserved flue opening in the floor slab, with one end of the bars resting on the floor slab and the other end inserted into the concrete wall. This requires drilling holes in the wall using a hammer drill. Alternatively, angle steel can be pre-embedded in the flue opening using anchor nails during floor slab pouring, and the finished flue can then be directly unloaded by supporting the pre-embedded angle steel at the flue opening. Another method is to drill holes inside the pre-reserved flue opening after the floor slab is poured, and then use bolts to fix the angle steel in place to achieve unloading.

[0004] The commonly used flue unloading methods mentioned above have the following problems. First, the method of installing steel bars is complicated because the steel bars are inserted after the main structure is poured. It requires drilling holes in the wall, which is time-consuming and labor-intensive. At the same time, there is a risk of damaging the wall structure. In addition, the accuracy of steel bar positioning is low and the quality of steel bar installation is difficult to guarantee. Second, the method of fixing angle steel at the flue opening is not secure enough and the angle steel is easy to fall off, which poses a safety hazard. Utility Model Content

[0005] The purpose of this utility model is to provide a reusable flue unloading steel bar pre-embedded fixing device to solve the problems and defects in the unloading of finished flue installation in the above-mentioned background technology, and to realize the unloading steel bar and the floor slab being poured together.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A reusable flue unloading reinforcement pre-embedded fixing device is disclosed. The fixing device is cast together with the floor slab and the unloading reinforcement to achieve flue opening shaping and unloading reinforcement fixing. The fixing device includes a flue opening shaping template, reinforcing ribs, and square steel internal supports. The flue opening shaping template includes side molds and a bottom mold. The lower edge of the side mold is fixedly connected to the outer edge of the bottom mold. The bottom mold has through holes evenly distributed for connecting the floor template. The upper edge of the side mold has a slot for fixing the unloading reinforcement. A reinforcing rib is provided between the side mold and the bottom mold. Square steel internal supports are horizontally fixed between two opposite side molds. Two sets of square steel internal supports are provided.

[0008] Furthermore, the flue outlet molding template can be made by splicing four angle steel pieces, or by separately cutting and splicing the bottom mold and side mold.

[0009] The flue outlet formwork is made of four angle steel pieces spliced ​​together. The side mold and bottom mold correspond to the two sides of the angle steel, and the two adjacent angle steel pieces are perpendicular to each other, forming a rectangle and being welded and fixed.

[0010] Using angle steel to make the flue outlet template is more convenient. There is no need to cut the side mold and bottom mold separately. You only need to cut the angle steel to the required size and splice them together.

[0011] Preferably, the side mold and the bottom mold are cut separately. There are four side molds and four bottom molds. The side mold is a trapezoidal steel plate and the bottom mold is a long strip steel plate. The four bottom molds are spliced ​​and welded together in a U-shape. The long side of the side mold is welded and fixed to the outer edge of the bottom mold at an angle of 90 degrees. The flue outlet shaping template is in the shape of a flared mouth with a smaller top and a larger bottom.

[0012] The flue outlet template is designed to be smaller at the top and larger at the bottom for easy removal.

[0013] Preferably, the connections between the side mold, bottom mold, reinforcing ribs, and square steel inner supports are all made by welding, and the welding method is spot welding or segment welding.

[0014] Using spot welding or segment welding facilitates dismantling, reuse, and recycling later. After the poured floor slab and walls have completely solidified, each part can be dismantled by hammering or cutting and collected in categories for reuse.

[0015] Preferably, the square steel inner support is made of square steel with a specification of 40×40mm and a wall thickness of 3-4mm.

[0016] Hollow, high-strength square steel can provide excellent support for the formwork.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This utility model serves as a template for pre-reserved flue openings and can also fix unloading reinforcing bars. This utility model allows unloading reinforcing bars to be pre-embedded in the flue openings of the floor slab, solving the problems of cumbersome construction and a series of safety issues when inserting unloading reinforcing bars after the main structure has been poured. Furthermore, the slots can accurately hold the unloading reinforcing bars at the nearest stress position, ensuring the quality of the rebar installation.

[0019] 2. The bottom mold of the flue outlet shaping template in this utility model is provided with through holes, which facilitates the connection with the floor template when it is poured together with the floor slab, ensuring that the template does not fall off during pouring. At the same time, the flue outlet shaping template is designed with a shape that is smaller at the top and larger at the bottom, which makes it easy to remove after solidification.

[0020] 3. This utility model adopts a modular structure and is fixed by spot welding or segment welding, which can be easily disassembled, classified and collected for easy reuse. Attached Figure Description

[0021] Figure 1 This is a schematic diagram showing the connection relationship between the flue unloading steel bar pre-embedded fixing device and the unloading steel bar in Embodiment 1 of this utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of the flue unloading steel bar pre-embedded fixing device according to Embodiment 1 of this utility model;

[0023] Figure 3 This is a top view of the flue unloading steel bar pre-embedded fixing device according to Embodiment 1 of this utility model;

[0024] Figure 4 This is a bottom view of the flue unloading steel bar pre-embedded fixing device according to Embodiment 1 of this utility model;

[0025] Figure 5 for Figure 1 AA section view;

[0026] Figure 6 for Figure 1 BB section view;

[0027] Figure 7 This is a schematic diagram of the installation and fixing of the flue unloading steel reinforcement pre-embedded fixing device before pouring.

[0028] Figure 8 This is a schematic diagram of the pre-embedded fixing device for unloading reinforcing bars in the flue of this utility model after the casting is completed;

[0029] Figure 9 This is a schematic diagram showing the fixing effect of the unloading steel bar after the removal of the pre-embedded fixing device for the flue unloading steel bar of this utility model;

[0030] Attached reference numerals: 1. Fixing device; 1-1. Flue outlet formwork; 1-1-1. Side formwork; 1-1-2. Bottom formwork; 1-1-3. Through hole; 1-1-4. Slot; 1-2. Reinforcing rib; 1-3. Square steel internal support; 2. Unloading reinforcement; 3. Floor slab; 3-1. Floor formwork; 3-2. Floor slab reinforcement cage; 4. Wall; 4-1. Wall reinforcement cage. Detailed Implementation

[0031] The technical solution of this 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 this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] like Figures 1 to 5 As shown, a reusable flue unloading reinforcement pre-embedded fixing device is provided. The fixing device 1, together with the unloading reinforcement 2 and the floor slab 3, is cast to achieve the shaping of the flue opening and the fixing of the unloading reinforcement 2. The fixing device 1 includes a flue opening shaping template 1-1, a reinforcing rib plate 1-2, and a square steel inner support 1-3. The flue opening shaping template 1-1 includes a side mold 1-1-1 and a bottom mold 1-1-2. The lower edge of the side mold 1-1-1 is fixedly connected to the bottom mold 1-1. -2 The outer edge of the bottom mold 1-1-2 is provided with through holes 1-1-3 evenly arranged. The through holes 1-1-3 are used to connect the floor template 3-1. The upper edge of the side mold 1-1-1 is provided with a slot 1-1-4 for fixing the unloading steel bar 2. A reinforcing rib plate 1-2 is provided between the side mold 1-1-1 and the bottom mold 1-1-2. A square steel inner support 1-3 is horizontally fixed between the two opposite side molds 1-1-1. The square steel inner support 1-3 is provided in two sets.

[0033] Example 1:

[0034] The flue outlet template 1-1 is made of angle steel splicing. The angle steel is equilateral angle steel, and the side length of the angle steel is consistent with the thickness of the floor slab 3. In this embodiment, angle steel with specifications of 120×120mm and a thickness of 3mm is used. The angle steel is cut and cut according to the flue outlet size standard. The four angle steel pieces are spliced ​​in a rectangle. The two sides of the angle steel are corresponding to the side mold 1-1-1 and the bottom mold 1-1-2. The bottom mold 1-1-2 faces inward. Through holes 1-1-3 are evenly set on one side of the bottom mold 1-1-2 of the angle steel, and slots 1-1-4 are set on one side of the side mold 1-1-1 of the angle steel. Two slots 1-1-4 are set on each angle steel for fixing the unloading reinforcement 2. The four angle steel pieces are welded and fixed together by spot welding. Reinforcing ribs 1-2 are evenly arranged between the two sides of the angle steel. The reinforcing ribs 1-2 are made of 5mm thick steel plates and are welded to the angle steel using spot welding. Square steel inner supports 1-3 are welded between the two opposite angle steels. The square steel inner supports 1-3 are made of square steel with a specification of 40×40mm and a wall thickness of 3-4mm.

[0035] Example 2:

[0036] When fabricating the flue outlet shaping template 1-1, the side molds 1-1-1 and bottom molds 1-1-2 are cut separately using 3mm thick steel plates. Four pieces of each type are prepared: four side molds 1-1-1 and four bottom molds 1-1-2. The side mold 1-1-1 is a trapezoidal steel plate, and the bottom mold 1-1-2 is a long strip steel plate. The four bottom molds 1-1-2 are spliced ​​and welded together in a U-shape. The long side of the side mold 1-1-1 is welded and fixed to the outer edge of the bottom mold 1-1-2 at an angle. The flue outlet shaping template 1-1 has a flared shape, smaller at the top and larger at the bottom. The side molds 1-1-1 and 1-1-2 are connected together. The bottom formwork 1-1-2 and the side formwork 1-1-1 are all spot welded together. Through holes 1-1-3 are evenly provided on the bottom formwork 1-1-2 for connecting the floor formwork 3-1 and casting it together with the floor slab 3. The upper edge of the side formwork 1-1-1 is provided with a slot 1-1-4 for fixing the unloading reinforcement 2. A reinforcing rib plate 1-2 is provided between the side formwork 1-1-1 and the bottom formwork 1-1-2. The square steel inner support 1-3 is welded and fixed between the two opposite side formworks 1-1-1. The square steel inner support 1-3 is made of square steel with a specification of 40×40mm and a wall thickness of 3~4mm.

[0037] Explanation of the principle of this utility model:

[0038] This utility model includes a flue outlet template 1-1. A slot 1-1-4 for fixing the unloading steel bar 2 is provided on the upper edge of the side mold 1-1-1 of the flue outlet template 1-1. Therefore, this utility model can serve as a flue outlet template and also fix the unloading steel bar 2. This utility model can pre-embed the unloading steel bar 2 into the flue outlet reserved on the floor slab 3 by casting together with the floor slab steel bar skeleton 3-2 and the wall steel bar skeleton 4-1. This eliminates the need for rebar installation during the later installation of the finished flue and ensures good rebar quality.

[0039] like Figures 6 to 9 The following is a description of the usage process of this utility model:

[0040] First, the fixing device 1 is fabricated. Following the fabrication method described in the above embodiment, the flue outlet shaping template 1-1 is fabricated. Then, through holes 1-1-3 are drilled in the bottom mold 1-1-2, and slots 1-1-4 are cut in the side mold 1-1-1. Reinforcing ribs 1-2 are welded between the bottom mold 1-1-2 and the side mold 1-1-1, and square steel inner ribs 1-3 are welded between the side molds 1-1-1. It should be noted that spot welding is used to connect the various parts. Before welding, tools such as wire brushes and grinding wheels should be used to remove oxide scale, rust, oil, and other debris from the surface of the area to be welded. The weld bevel should meet the requirements, and the components connected by fillet welds should fit tightly, with the root gap not exceeding 2mm.

[0041] Next, mark the installation position of the fixing device 1 on the floor formwork 3-1 according to the design position of the flue opening, drill holes in the floor formwork 3-1, and connect and fix the bolts through the bottom formwork 1-1-2 to the floor formwork 3-1. The bolts must be firmly fixed and not loose.

[0042] Next, install the unloading reinforcement 2. Place the Φ12 steel bars on the fixing device 1. The number depends on the actual site conditions. Tie one end to the upper reinforcement of the floor slab, and the other end penetrates 70mm into the wall and is tied to the wall reinforcement. The quality of the steel bars should meet relevant standards, including length, diameter, and weight. There should be no obvious deformation, breakage, or corrosion. The steel bars should be kept as horizontal, vertical, and flat as possible. Measurements should be taken before installation.

[0043] Next, the fixing device 1, the unloading steel bar 2, and the floor slab 3 concrete are poured together. During the pouring, a cover plate is set on the top of the fixing device 1 to prevent the concrete from filling the mold.

[0044] After the concrete has hardened, when removing the floor formwork 3-1, remove the fixing device 1 at the same time. The removed fixing device 1 should be neatly stacked according to the flue opening formwork 1-1, reinforcing rib plate 1-2, and square steel internal support 1-3, and cured in time for easy reuse.

[0045] After the fixing device 1 is removed, the upper part of the pre-embedded unloading steel bar 2 is used to support the finished flue, which can reduce the vertical load of the flue.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A reusable flue gas duct unloading steel bar pre-embedded fixing device, characterized in that, The fixing device is cast together with the floor slab and unloading reinforcement to achieve the shaping of the flue opening and the fixing of the unloading reinforcement. The fixing device includes a flue opening shaping template, a reinforcing plate, and a square steel internal support. The flue opening shaping template includes a side mold and a bottom mold. The lower edge of the side mold is fixedly connected to the outer edge of the bottom mold. The bottom mold is evenly provided with through holes for connecting the floor template. The upper edge of the side mold is provided with a slot for fixing the unloading reinforcement. A reinforcing plate is provided between the side mold and the bottom mold. A square steel internal support is horizontally fixed between two opposite side molds. There are two sets of square steel internal supports.

2. The flue unloading steel reinforcement pre-embedded fixing device according to claim 1, characterized in that, The flue outlet shaping template is made of angle steel splicing. The side mold and bottom mold are respectively corresponding to the two sides of the angle steel. The angle steel is spliced ​​into a rectangle and welded and fixed.

3. The flue unloading steel reinforcement pre-embedded fixing device according to claim 1, characterized in that, The flue outlet shaping template is shaped like a trumpet, with a smaller top and a larger bottom. There are four side molds and four bottom molds. The side molds are trapezoidal steel plates, and the bottom molds are long strip steel plates. The four bottom molds are spliced ​​together in a U-shape and welded to each other. The angle between the side molds and the bottom molds is 90 degrees.

4. The flue unloading reinforcement pre-embedded fixing device according to claim 1 or 3, characterized in that, The connections between the side mold, bottom mold, reinforcing ribs, and square steel inner supports are all made by welding, and the welding methods are spot welding or segment welding.

5. The flue unloading reinforcement pre-embedded fixing device according to claim 1, characterized in that, The square steel inner support is made of square steel with a specification of 40×40mm and a wall thickness of 3~4mm.

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