A steel sub-frame for door and window integrated with main structure and its using method

Abstract

This invention discloses an integrated steel sub-frame for doors and windows and its usage method. It includes a main body of the steel sub-frame, which is composed of several steel sub-frames. Each steel sub-frame is hollow and straight. Two water-stop wing plates are provided on each side of the steel sub-frame, and a raised cross-section water-stop structure is designed in the middle of one side. Adjacent steel sub-frames are connected at corners via corner connectors. The two ends of the corner connectors are inserted to fix the steel sub-frames. The steel sub-frames are fixedly connected to the aluminum alloy template of the doors and windows, and are secured to the outside of the aluminum alloy template with matching nuts. Anchors are provided at intervals on the outer side of the steel sub-frames to ensure reliable anchoring. This invention provides high installation strength, good waterproofing, and significantly optimized installation technology for the door and window steel sub-frame.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and in particular to a steel sub-frame for doors and windows that is integrated with the main structure and its usage method. Background Technology

[0002] With the continuous development of the construction industry and the increasing demands for building quality, there is a constant improvement in construction standardization, efficiency, and cost control. However, the current installation process for building doors and windows still follows the procedure of first leaving the opening, then installing the outer frame, followed by sealing the gaps around the doors and windows, and finally assembling the door and window sashes. This installation method requires a significant amount of work for both door and window replacement and maintenance. Especially when replacing doors and windows, the original sealant must be removed from the wall around the opening before replacement can begin. This process is labor-intensive and time-consuming, and causes considerable damage to the wall structure, creating safety hazards for the building's future use. Furthermore, the opening preparation is affected by various factors during civil construction, such as formwork, concrete pouring, and masonry work, and cannot be completed in one go. It requires manual plastering and adjustments later, increasing the workload, reducing efficiency, and increasing the risk of leakage due to the need for sealing the gaps around the door and window openings.

[0003] The traditional solution to these problems is to add a steel sub-frame to the outside of the doors and windows. This sub-frame is installed after the concrete and masonry work is completed. The gap between the sub-frame and the masonry is filled with waterproof mortar before the interior and exterior plastering. The doors and windows themselves are installed after the interior and exterior painting and other civil engineering work is finished. This ensures the waterproofing quality of the doors and windows while preventing damage or contamination from the civil construction work.

[0004] However, adding a steel subframe brings new problems. The conventional installation method for the steel subframe is to first temporarily fix it with wooden wedges, then use metal expansion bolts to fix the steel subframe to the concrete wall. The gap between the steel subframe and the masonry needs to be filled tightly with dry-hardened cement mortar, and the corners should be rounded. The waterproof mortar should be finished in a V-shape. After the mortar reaches a certain strength, the temporary wooden wedges are removed, and the gap is filled tightly with dry-hardened cement mortar. This construction process is relatively complex and greatly affected by human factors. Since the lower part of the steel subframe is the main channel for rainwater leakage, the quality of the waterproof mortar sealing in this area directly affects the waterproofing effect. There is a risk of plaster hollowing, cracking, and water leakage around the door and window frames during secondary plastering and sealing. The mortar used for plastering may also contaminate and corrode the doors and windows, increasing later maintenance costs.

[0005] In the residential sector, aluminum alloy formwork has been widely used to replace wooden formwork due to its advantages such as flexible assembly and disassembly, high rigidity, long service life, high precision, smooth and clean concrete pouring, and low dependence on machinery during construction. Furthermore, current mature residential design concepts generally optimize the area around door and window openings with all-concrete structures. Therefore, traditional methods for positioning and installing steel subframes for doors and windows can no longer meet current technical requirements. Improving the installation strength of steel subframes for doors and windows, enhancing waterproofing, and optimizing installation processes have become urgent problems to be solved in this field. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing an integrated steel sub-frame for doors and windows that is constructed in conjunction with the main structure. The sub-frame includes a main body composed of several hollow, straight steel sub-frames. Each sub-frame has two water-stop wing plates on each side, and a raised cross-section water-stop sill is designed in the middle of one side. Adjacent sub-frames are connected at corners via corner connectors, with both ends of the corner connectors used to fix the sub-frames. The sub-frames are fixedly connected to the aluminum alloy template for doors and windows, and are secured to the outside of the template with matching nuts. Anchors are provided on the outer surface of the sub-frames to ensure reliable anchoring.

[0007] Preferably, the interior of the steel sub-frame is provided with a first reinforcing rib, a second reinforcing rib, and a third reinforcing rib, wherein the second reinforcing rib and the third reinforcing rib are arranged intersectingly, and the first reinforcing rib is arranged between the intersection of the second reinforcing rib and the third reinforcing rib and the side of the steel sub-frame.

[0008] Preferably, the corner connector uses a grid-shaped steel frame as the internal skeleton and is wrapped with plastic steel on the outside. The size is the same as that of the steel sub-frame. The straight sections at both ends of the corner connector are the same as the inner diameter of the steel sub-frame. The straight sections have reserved slots that match the three reinforcing ribs and can be directly inserted and fixed.

[0009] Preferably, an anchor is provided every 500mm on the outer side of the steel sub-frame. The pre-embedded point of the anchor is connected to the steel sub-frame by three round steel bars, and the ends are bent.

[0010] Preferably, an anchor is provided every 500mm on the outer side of the steel sub-frame, and the pre-embedded point of the anchor is a "Y"-shaped steel bar, with only one welding point between the anchor and the steel sub-frame.

[0011] Preferably, each side of the steel sub-frame is provided with a row of bolt holes, and a through threaded rod is bent, with one end connected to the bolt hole on the side of the steel sub-frame and the other end passing through the reserved hole on the aluminum alloy template of the door and window, thus completing the fixed connection between the steel sub-frame and the aluminum alloy template of the door and window.

[0012] Preferably, each side of the steel sub-frame is provided with a serrated steel bar, which is welded to the steel sub-frame. One end of a steel wire is tied to the serrated steel bar, and the other end is drilled in the aluminum alloy template, passed through the aluminum alloy template, and then fixed.

[0013] A steel sub-frame for doors and windows that is integrated with the main structure and its usage method includes the following steps:

[0014] Step 1: Measure the required dimensions of the steel sub-frame, cut the material according to the dimensions, connect them using corner connectors, complete the splicing of the main body of the steel sub-frame, weld the anchors to the main body of the steel sub-frame, and after the steel bars around the doors and windows are tied, first install the aluminum alloy formwork on the outside of the wall where the door and window openings are located, and then install the aluminum alloy formwork on the side of the door and window openings.

[0015] Step 2: Fit the steel sub-frame into the aluminum alloy template and center it. Taking the side of the steel sub-frame as an example, select two bolt holes at approximately one-third and two-thirds of the length, for ease of construction. Screw in the four matching threaded rods and then bend them towards the main frame of the door and window. After the aluminum alloy template is reinforced, use the matching nut 102 to screw the threaded rods into the outside of the aluminum alloy template to accurately position the steel sub-frame.

[0016] Step 3: After the concrete pouring is completed, when dismantling the aluminum alloy formwork, first remove the matching nut 102. After the aluminum alloy formwork is removed, cut off the excess threaded rod flush with the concrete surface.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: The steel sub-frame is internally provided with a first reinforcing rib, a second reinforcing rib, and a third reinforcing rib, overcoming the limitation that the rigidity of the steel sub-frame relies solely on the strength of the outer square tube. This significantly reduces the probability of deformation and twisting during the installation of the steel sub-frame and concrete pouring, thereby reducing the probability of rework. The water-stop wing plates on both sides of the steel sub-frame are tightly bonded to the concrete after pouring, ensuring that the actual water-stopping effect after construction closely matches the designed water-stopping effect. The water-stopping structure sill in the middle of the steel sub-frame... The traditional waterproofing measures for the steel sub-frame and main frame of doors and windows are enhanced with an additional waterproof structure, effectively reducing the probability of water leakage between the sub-frame and the main frame. The anchors for the steel sub-frame are flexible and can be designed in different forms to well match different working conditions during construction. The steel sub-frame is positioned using through-threaded rods and matching nuts, which can accurately position the steel sub-frame and effectively prevent the problem of steel sub-frame misalignment after construction caused by simply fixing the steel sub-frame inside the aluminum formwork in the traditional method. The positioning method used for the steel sub-frame can effectively reduce the installation time of the steel sub-frame and improve construction efficiency. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a three-dimensional view of the completed construction of this invention;

[0020] Figure 2 This is a 3D view of the corner connector;

[0021] Figure 3 This is a top view of the present invention;

[0022] Figure 4 This is a three-dimensional schematic diagram of the present invention;

[0023] Figure 5 This is a three-dimensional schematic diagram of another structure of the present invention;

[0024] Figure 6 This is a three-dimensional schematic diagram of different anchors of the present invention.

[0025] In the diagram: 101, concrete wall; 102, matching nut; 201, corner connector; 202, internal frame; 203, reserved slot; 301, waterstop wing plate; 302, first reinforcing rib; 303, second reinforcing rib; 304, threaded rod; 305, bolt hole; 306, third reinforcing rib; 307, anchor; 308, waterstop structural sill; 401, serrated steel bar; 402, steel wire. Detailed Implementation

[0026] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments described.

[0027] Reference Figures 1 to 6 This invention discloses an integrated steel sub-frame for construction doors and windows, comprising a main body of steel sub-frames composed of several steel sub-frames. Each steel sub-frame is hollow and straight. Each side of the steel sub-frame is provided with two water-stop wing plates 301, and a water-stop structural sill 308 with a raised section is designed in the middle of one side to achieve an effective water-stopping effect. Adjacent steel sub-frames are connected at the corner by corner connectors 201. The two ends of the corner connectors 201 are inserted to fix the steel sub-frames. The steel sub-frames are fixedly connected to the aluminum alloy template of the doors and windows, and the steel sub-frames are fixed on the outside of the aluminum alloy template with matching nuts 102. Anchors 307 are provided on the outer side of the steel sub-frames to complete the reliable anchoring of the steel sub-frames.

[0028] In this invention, the interior of the steel sub-frame is provided with a first reinforcing rib 302, a second reinforcing rib 303, and a third reinforcing rib 306, wherein the second and third reinforcing ribs are arranged intersectingly, and the first reinforcing rib 302 is located between the intersection of the second and third reinforcing ribs 303 and the side of the steel sub-frame, ensuring that the steel sub-frame is not damaged during installation and concrete pouring, and that its strength and rigidity are guaranteed.

[0029] Furthermore, the corner connector 201 uses a grid-shaped steel frame as its internal skeleton 202, with an outer plastic steel covering. Its dimensions are consistent with those of the steel sub-frame. The dimensions of the straight sections at both ends of the corner connector are consistent with the inner diameter of the steel sub-frame. The straight sections have pre-reserved slots 203 that match the three reinforcing ribs, allowing for direct insertion and fixation. The corner connector allows for adaptation to various heights and widths of door and window steel sub-frames by cutting straight sections of steel sub-frames of different lengths to fit the corner connector.

[0030] In addition, an anchor 307 is installed every 500mm on the outside of the steel sub-frame. The pre-embedded point is connected to the steel sub-frame by three round steel bars with a diameter of 6mm. The ends are bent to ensure that the steel sub-frame is firmly anchored after the concrete is poured. As another embodiment of this technical solution, the anchor 307 adopts a "Y" shaped steel bar. When making the steel sub-frame, the anchor can be made in advance. This anchor 307 has only one welding point with the steel sub-frame, which can speed up the construction.

[0031] Finally, a row of bolt holes 305 is provided on each side of the steel sub-frame. Through threaded rods 304 are bent, with one end connected to the bolt hole 305 on the side of the steel sub-frame and the other end passing through the reserved hole on the aluminum alloy template. After the aluminum alloy template is installed and positioned, the steel sub-frame is fixed on the outside with matching nuts 102. As another embodiment of this technical solution, the bolt holes 305 on both sides of the steel sub-frame are replaced with sawtooth steel bars 401. The sawtooth steel bars 401 are welded to the steel sub-frame. Taking the side of the steel sub-frame as an example, at approximately one-third and two-thirds of the length, for ease of construction, steel wires 402 are used. One end is tied to the sawtooth steel bar 401, and the other end is drilled in the aluminum alloy template, passed through the aluminum alloy template, and then fixed.

[0032] The installation and usage steps of this invention are as follows:

[0033] Step 1: Measure the required dimensions of the sub-frame and cut the materials accordingly. Use corner connectors to assemble the main body of the steel sub-frame. Weld the anchor 307 to the main body of the steel sub-frame. According to the on-site construction progress, after the steel reinforcement around the doors and windows is tied, first install the aluminum alloy formwork on the outside of the wall where the door and window openings are located, and then install the aluminum alloy formwork on the sides of the door and window openings.

[0034] Step 2: Fit the steel sub-frame into the aluminum alloy formwork, centering it. Taking the side of the steel sub-frame as an example, at approximately one-third and two-thirds of its length, select two bolt holes 305 at each point for ease of construction. Screw in four matching threaded rods 304, then bend them towards the main frame of the door and window. During the initial installation, based on the positioning of the bent threaded rods 304, drill holes slightly larger than the diameter of the rods in the aluminum alloy formwork, and insert the other end of the threaded rods 304 into the holes in the aluminum alloy formwork. During subsequent construction, the bolt holes and holes in the aluminum alloy formwork selected during the initial installation can be used for accurate positioning. Seal the aluminum alloy formwork inside the concrete wall 101 where the door and window openings are located. After the aluminum alloy formwork is reinforced, use matching nuts 102 to screw the threaded rods 304 into the outside of the aluminum alloy formwork to accurately position the steel sub-frame. Using this method to reinforce the steel sub-frame prevents displacement or damage during concrete pouring and vibration. Most of the 304 through-thread screws are also embedded in concrete, thus serving as embedded parts.

[0035] Step 3: After the concrete pouring is completed, when dismantling the aluminum alloy formwork, first remove the matching nut 102. This nut can be reused. After the aluminum alloy formwork is removed, cut off the excess threaded rod flush with the concrete surface.

[0036] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A steel sub-frame for doors and windows that is integrated with the main structure during construction, characterized in that: The system includes a main steel sub-frame, which is composed of several steel sub-frames. Each steel sub-frame is hollow and straight. Each side of the steel sub-frame has two water-stop wing plates, and a water-stop structure with a raised section is designed in the middle of one side. Adjacent steel sub-frames are connected at the corners by corner connectors. The two ends of the corner connectors are inserted to fix the steel sub-frames. The steel sub-frames are fixedly connected to the aluminum alloy template of the doors and windows, and the steel sub-frames are fixed on the outside of the aluminum alloy template with matching nuts. Anchors are provided on the outer side of the steel sub-frames to ensure reliable anchoring. The steel sub-frame is provided with a first reinforcing rib, a second reinforcing rib and a third reinforcing rib respectively. The second reinforcing rib and the third reinforcing rib are arranged intersectingly. The first reinforcing rib is located between the intersection of the second reinforcing rib and the third reinforcing rib and the side of the steel sub-frame. The corner connector uses a grid-shaped steel frame as the internal skeleton and is wrapped with plastic steel on the outside. Its size is the same as that of the steel sub-frame. The straight sections at both ends of the corner connector are the same as the inner diameter of the steel sub-frame. The straight sections have reserved slots that match the three reinforcing ribs and can be directly inserted and fixed. An anchor is installed every 500mm on the outer side of the steel sub-frame. The pre-embedded point of the anchor is connected to the steel sub-frame by three round steel bars, and the ends are bent. Alternatively, the pre-embedded point of the anchor is a "Y" shaped steel bar, and the anchor is welded to the steel sub-frame by only one point. Each side of the steel sub-frame is provided with a row of bolt holes. A through-threaded rod is bent, with one end connected to the bolt hole on the side of the steel sub-frame and the other end passing through the reserved hole on the aluminum alloy template of the door and window, thus completing the fixed connection between the steel sub-frame and the aluminum alloy template of the door and window.

2. A method for using the steel sub-frame for doors and windows integrated with the main structure as described in claim 1, characterized in that, Includes the following steps: Step 1: Measure the required dimensions of the steel sub-frame, cut the material according to the dimensions, connect them using corner connectors, complete the splicing of the main body of the steel sub-frame, weld the anchors to the main body of the steel sub-frame, and after the steel bars around the doors and windows are tied, first install the aluminum alloy formwork on the outside of the wall where the door and window openings are located, and then install the aluminum alloy formwork on the side of the door and window openings. Step 2: Fit the steel sub-frame into the aluminum alloy template and center it. On the side of the steel sub-frame, at approximately one-third and two-thirds of its length, select two bolt holes at each point for ease of construction. Screw in the four matching threaded rods and then bend them toward the main frame of the door and window. After the aluminum alloy template is reinforced, use the matching nuts to screw the threaded rods into the outside of the aluminum alloy template to accurately position the steel sub-frame. Step 3: After the concrete pouring is completed, when dismantling the aluminum alloy formwork, first remove the matching nuts. After the aluminum alloy formwork is removed, cut off the excess threaded rods flush with the concrete surface.

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